Meiosis is the common factor which is responsible for the production of new combinations or recombination in the organisms which reproduce through sexual mode of reproduction.
What is Meiosis?Meiosis is a special type of cell division which occurs in the germ cells in organisms which reproduce through sexual mode of reproduction. These organisms produce the gametes, such as sperms or egg cells. Meiosis involves two rounds of division which ultimately result into formation of four daughter cells with only one copy of each chromosome.
Recombination or new combination results when two molecules of DNA exchange pieces of their genetic material with each other. One of the most common examples of recombination can be observed during meiosis specifically, during the prophase I stage, when homologous chromosomes line up in pairs and swap some segments of their DNA.
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ASAP HELP!!!!!!! LIMITED TIME!!!!!!! PLEASE
Hydrogen fuel cells, biodiesel, and long-term electric batteries are potential solutions to
Select one:
1. carbon sequestration
2. replacing coal as a major fuel for generating electricity
3. cap-and-trade emission control
4. reducing carbon emissions from cars and trucks
Answer:
reducing carbon emissions from cars and trucks
If a person lives at high altitudes for an extended period of time, other body responses occur. One response is an increase in the number of red blood cells.
C. Explain how this response is helpful to the body.
At high altitudes, air temperature is also generally colder than at sea level.
D. Describe and explain one internal body response that occurs when a person has been outside long enough for his core temperature to drop.
Answer:
When a person has been outside long enough for their core temperature to drop, their body will respond by shivering. Shivering is an involuntary muscle movement that helps to generate heat and raise the core body temperature back to a normal level. This is an important response as it helps to protect the body from hypothermia, a dangerous condition in which the body's core temperature is too low.
Explanation:
In what ways are "Golden Rice" affect the sustainability of community? Discuss it in terms of all three pillars of sustainability: economic, social, and enviormental.
The Golden Rice will improve the sustainability of the community in the following ways:
economic - it will boost the economy of the community by providing a means of income generationsocial - it will boost the social life of the community it promotes the health and well-being of the community.environmental - it will improve land use and reduce the amount of land that is used for agriculture thereby preserving the natural environment.What is the Golden Rice?Golden rice is a type of rice created by genetic engineering that allows the edible sections of the grain to generate beta-carotene, a precursor of vitamin A. Hence, it helps in the prevention of diseases due to a lack of vitamin A.
It has improved yield and hence, boosts the economic, social, and environmental well-being of the community.
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Evan was 54 meters away from his car adter shopping. It took 9 seconds to push a shopping card one third of the way directly to his car at a constant velocity. What was his velocity whilehe was pushing the cart ?
The velocity while Evan was pushing the cart is 50.15m/s.
How to calculate velocity?The velocity of a moving body can be calculated using one of the following equations of motion as follows:
s = ut + ½at²
Where;
s = distanceu = velocityt = timea = accelerationAccording to this question, Evan was 54 meters away from his car after shopping. It took 9 seconds to push a shopping card one third of the way directly to his car at a constant velocity. The velocity used is as follows:
54 = (u × 9) - ½ × 9.81 × 9²
54 = 9u - 397.31
54 - 397.31 = 9u
u = 50.15m/s
Therefore, 50.15m/s is the velocity while pushing the cart.
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Evan's velocity while pushing the cart towards his car would be 2 m/s.
Velocity calculationThe velocity of a moving object is the speed of the object in a specific direction. Thus, velocity is the ratio of distance covered relative to time.
Mathematically, velocity = distance/time.
Evans took a total of 9 seconds to cover 1/3 of his distance from his car.
1/3 of 54 = 18 meters.
Thus, Evan covered a distance of 18 meters in 9 seconds. His speed can be calculated as follows:
Distance = 18 meters
Time = 9 seconds
Speed = 18/9
= 2 m/s
In other words, the velocity of Evan while he was pushing the cart is 2 m/s towards his car.
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in which sealed container would the organisms be able to continuously cucle 02 and Co2 gases
The container or jar with snails crawling on the living plants would be the one where organisms be able to continuously cycle oxygen and carbon dioxide gases. Thus, the correct option is B.
What is Gaseous exchange?Gas exchange is the physical process by which different gases move passively by diffusion across a surface. For example, this surface might be air or water interface of a water body, the surface of a gas bubble in a liquid, or a biological membrane which forms the boundary between an organism and its extracellular environment.
A sealed container is mainly comprised of a jar with snails which is crawling on the living plants, represents continuously cycle oxygen gas and carbon dioxide gases between the two organisms. The plants produce oxygen gas by consuming carbon dioxide in the photosynthesis process, and the snails produce carbon dioxide and consume oxygen gas during the respiration process.
Therefore, the correct option is B.
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Your question is incomplete, most probably the complete question is:
In which sealed container would the organisms be able to continuously cycle O2 and CO2 gases?
A. A jar with a lizard eating a snail
B. An jar with snails crawling on living plants
C. A room with a cat chasing a mouse
D. A room with mice eating moldy grain
Evidence collected from a victim at a crime scene includes the following:
3rd instar of a blowfly
Hair that is black and crescent shaped, with a fragmented medulla
Black soot in the lungs
What inference can be made about the victim using the evidence?
The victim has African ancestry and may have died in a fire four days ago.
The victim has European ancestry and may have died in a fire over a week ago.
The victim has Asian ancestry and was likely killed elsewhere by fire two days before.
The victim has European ancestry, and the body was burned after death four days ago.
'The victim has European ancestry, and the body was burned after death four days ago'.
What do you mean by victim?
Victim is a term used to describe an individual who has suffered harm, injury, or loss due to the actions of another person or entity. Victims can suffer physical, emotional, psychological, and financial harm. Victims may also suffer from secondary victimization, which is when they experience further harm due to the reactions of others to their victimization.
The 3rd instar of a blowfly indicates that the body had been dead for four days. The hair suggests that the victim likely had European ancestry, as crescent shaped black hair is common in people of European descent. The presence of black soot in the lungs indicates that the body was burned after death.
Hence, option D is correct.
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A radioactive element has a half-life of 2,000 years. If a sample of this element begins with a mass of 100 grams, how long would you have to wait for the mass to decrease to 25 grams?
Therefore, a half-life of 2000 years saying that 100 grams will decompose to 50 grams in 2000 years. That 50 g will decompose to the requested 25 grams in another 2000 years. 2,000 + 2,000 = 4,000 years are required.
Describe element.Elements are substances that cannot further breakdown as a result of any chemical reaction. There are a certain number of protons in each element's atom.
Which elements are important?Since they make the organic compounds that are present in all living things, chemical elements are crucial to living things. Carbon is the primary element in all organic compounds, including lipids, nucleic acids, proteins, and carbohydrates.
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Use the terms below to describe the information given in the punnet square.
A. Genotype
B. Phenotype
D. Offspring
C. Allele
Use the scenario to answer the question.
A student decides to test the effects of watering on plants. She chooses 6 tomato plants and places all of them in the same part of a garden with plenty of space between them. They get the same amount of sunlight and the same amount of fertilizer each day. She gives each plant a different amount of water, with the first plant getting no water and the others getting 200 mL, 400 mL, 600 mL, 800 mL, and 1,000 mL. She records the total height of the plants each day for 3 weeks.
What is the independent variable in this experiment?
Amount of water would be the independent variable in this case.
What is Independent variable?An independent variable is a factor that you deliberately change or control to see what effect it has. Variables that respond to changes in the independent variable are called dependent variables. It depends on the independent variable. Independent variables are plotted on the x-axis.
In a scientific experiment, an independent variable is a variable that is altered or under control. It symbolizes the root cause or motivation behind a result.
The variables that the investigator modifies to test their dependent variable are known as independent variables. The dependent variable changes as a direct result of changes in the independent variable.
Therefore, Amount of water would be the independent variable in this case.
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6. Understanding of the cell has changed over
time. Which explains why this has occurred?
A New scientific discoveries lead to new theories.
B Theories are redesigned every ten years as a necessity.
C The constantly evolving universe requires new theories to describe it.
D Larger number of scientists have opinions that must be incorporated.
Answer:
A
Explanation:
Cell theory was first formulated by Schwann and Schleiden, but because of new and advanced technology some statements were replaced and some are added.
Check all characteristics of life:
- Complex, ordered organization consisting of one or more cells (1)
- Use and transforms energy to perform work (2)
- Sensitive and responsive to the external environment (3)
- Regulate internal conditions(4)
- Grow, develop, and reproduce(5)
- Evolutionarily adapt and over time undergo descent but with modification(6)
The characteristics of life are complexity, ordered organization, energy use and transformation, and regulation of internal conditions. and all of the statements about life forms are correct.
What are the characteristics of the life forms?There are both eukaryotic and prokaryotic life forms, as well as unicellular and multicellular animals, but all life forms grow, take nutrients, adapt, and evolve; some can regulate their internal temperature, use energy, and transform it, such as in photosynthesis.
Hence, the characteristics of life are complexity, ordered organization, energy use and transformation, and regulation of internal conditions. and all of the statements about life forms are correct.
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Which of the following is a characteristic of renewable sources of energy
They are exhaustible
They cause air pollution
They will run out soon
They cause less pollution
Pls help ty
They cause less pollution. Renewable sources of energy, such as solar, wind, and hydroelectric, cause significantly less air and water pollution than non-renewable sources, such as coal and oil.
What is pollution?Pollution is the presence of toxic substances in the environment that can have a negative effect on humans, animals, and plants. It can either be the result of natural processes or due to man-made activities. Pollution can occur in the air, water, soil, and even in the food we consume. Common forms of pollution include air pollution, water pollution, plastic pollution, and noise pollution. Air pollution is the release of pollutants into the air which can cause harm to humans and the environment. Water pollution is the contamination of surface or ground water and can be caused by agricultural runoff, industrial pollution, and sewage. Plastic pollution is the accumulation of plastic particles in the environment that can damage ecosystems.
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state the three laws inheritance by Mendel. explain
Mendel's three rules are the Law of Segregation, the Law of Dominance, and the Law of Independent Assortment.
It implies that meiosis is the process of separating two alleles from one another. Two copies of each chromosome are actually separated from one another during the second stage of meiosis, which is when segregation or separation occurs.
The child will inherit the XX genotype and the dominant phenotype if one parent carries the dominant allele X in two copies and the other parent carries the recessive allele X in two copies. The segregation of the allele pair into two daughter cells during the second stage of meiosis division is Mendel's third rule.
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The three laws of inheritance proposed by Mendel are: the law of segregation, the law of dominance, and the law of independent assortment.
What are Mendel's law of inheritance?The three laws of inheritance proposed by Gregor Mendel are:
The law of dominance: This law states that when an organism inherits two different forms of a gene (alleles) for a trait, one allele will be dominant and will be expressed in the organism's phenotype, while the other allele will be recessive and will not be expressed. For example, if an organism inherits one allele for brown eyes (B) and one allele for blue eyes (b), the brown eye allele is dominant and the organism will have brown eyes.
The law of segregation: This law states that during the formation of sex cells (gametes), the alleles for a trait separate from each other so that each gamete receives only one allele. This means that the offspring will inherit one allele from each parent and will therefore have a combination of alleles for a trait.
The law of independent assortment: This law states that the inheritance of one gene or trait is independent of the inheritance of another gene or trait. In other words, the alleles for different traits are inherited independently of each other and are not linked in any way. This means that the probability of inheriting a specific combination of alleles for different traits is the product of the probabilities of inheriting each allele for each trait.
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According to Gordon all port which type of personality traits are the most dominant
According to Gordon Allport, the type of personality trait that is the most dominant is the central trait or the basic trait.
What is trait?This refers to a distinctive quality or character of a person. For example curiosity, fair, and dark. etc.
Gordon Allport is a psychologist and personality theorist. He divided personality traits into three categories: cardinal, central, and secondary. According to Allport, the most dominant type of personality trait is the central trait, also called as the "basic trait."
These traits are fundamental to a person's character and shape their overall personalities, such as honesty, kindness, and intelligence. Cardinal traits, on the other hand, are rare and extremely influential traits that shape a person's entire life and behavior, such as religious devotion or political ideology. Secondary traits are less important and more specific, such as being punctual or having a sense of humor.
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Explain how the structure of a cell allows localization of reactions, protection from reactive molecules, and greater efficiency of cellular processes than a bacterial cell.
The structure of a eukaryotic cell allows localization of reactions because there are subcompartments in the cell where specific enzymes colocalize, protection from reactive molecules refers to structural barriers, while greater efficiency of cellular processes in this cell than a bacterial cell is based on the subdivision of work.
What does subdivision of work mean in terms of a eukaryotic cell?The expression subdivision of work mean in terms of a eukaryotic cell makes reference to the presence of different cell compartments such as those associated with particular organelles which provide a suitable medium to carry out particular reactions such as the presence of hydrolytic enzymes in lysosomes.
Therefore, with this data, we can see that the subdivision of work is fundamental in a eukaryotic cell in order to perform different tasks, which is translated to higher metabolic efficiency when compared to bacteria.
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Experiment: Maria wants to see which fertilizer makes her fig plants
grow best. She will grow 3 fig plants. One plant she will add no
fertilizer, one plant she will add 1 mg of nitrogen powder, and one
plant she will add 1 mg of phosphorus powder. She will measure the
height of each plant every week for 3 months.
Question 1
What is the independent variable?
A. the height of the plant
B. the amount of fertilizer
C. the type of fertilizer
D. the type of plant
Question 3
What is a possible constant?
A. the height of the plant
B. the diameter of the plant
C. the type of fertilizer
D. the amount of fertilizer
Question 2
What is the dependent variable?
A. the height of the plant
B. the amount of fertilizer
C. the type of fertilizer
D. the type of plant
Question 4
Why did Maria not fertilize one of the
plants?
A. to make the experiment easier
B. to compare the results of the other
fertilizers (control group)
C. it was a mistake
D. to purposely kill that plant
nter the correct 4 digits to escape this level. *
LEVEL 3
Convert your letter into a number
A +4=7
7- B=2
C +2=9
5- D=4
Answer:
Answer 1: B. the amount of fertilizer
Answer 2: A. the height of the plant
Answer 3: D. the amount of fertilizer
Answer 4: B. to compare the results of the other fertilizers (control group)
Explanation:
Please select the word from the list that best fits the definition
Principle that involves an attempt to understand the meanings individuals attach to their actions.
Verstehen is the principle which involves the attempt for the understanding of the meanings individuals attach to their actions.
Principle that involves an attempt to understand the meanings individuals attach to their actions.?This idea is based on the German philosophical notion of Verstehen, which also serves as the foundation of sociology as a field of study of people and their behaviour.
The word itself exhibits the quality of deeply understanding something, which makes the method appropriate for sociologists and turns it into a means of learning about people and the acts that they take.
Weber suggested doing this, when one tries to put themselves in other people's shoes and see things from their perspective. The concept and practise of verstehen is today recognised as being essential to rejecting positivist social science (although Weber appeared to think that the two could be united). Understanding the purpose of an action is referred to as verstehen.
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The idea of comprehending the meanings people give to their acts is known as verstehen.
What is verstehen principle?A philosophy that makes an effort to comprehend the meanings people give to their activities.
This approach is based on the idea of Verstehen from German philosophy, which also serves as the basis for sociology as a discipline that studies people and their behavior.
The approach is excellent for sociologists because the word itself conveys the quality of deeply comprehending something, which transforms it into a way of learning about people and the actions they take.
When one tries to put themselves in other people's shoes and see things from their perspective, Weber advised doing this. Today, the idea of comprehension and its application are recognized as
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Help I am stuck on this question
All of an organism's characteristics are inheritable which evolves over millions of years. An example of this is the modern day horse's foot.
What is Evolution?This is referred to as the change in the heritable characteristics of biological populations over successive generations and it occurs as a result of the changing environmental conditions which boost the chances of survival of organisms.
This leads to the prevention of the extinction of species in the ecosystem and an example is modern day horse's foot in which they lost their side toes and developed a single hoof as a result of them needing to cover more ground for grazing.
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can you help with this
In the given question original DNA sequence has amino acid sequence methionine, tryptophan, asparagine, arginine, cysteine, and stop codon, so a mutation in 1 sequence: Transition, 2: Transition, and 3: Transversion.
How does a mutation in the DNA change the protein structure?In the first DNA sequence, the transition mutation changes the amino acid sequence of protein into methionine, stop, asparagine, arginine, and cysteine.
The second amino acid sequence after mutation is methionine, leucine, glutamine, proline, and leucine.
The third amino acid sequence after mutation is methionine, tryptophan, threonine, and alanine.
Therefore, a mutation in the DNA changes the amino acid sequence, which changes the structure and function of the protein.
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HELP ASAP!!!!!!! LIMITED TIME!!!!!!! PLEASE
The average temperature of Earth has increased approximately 0.8°C in the last one hundred years. Which of the following do researchers most attribute to this temperature increase?
Select one:
1. the lower amounts of carbon dioxide
2. increased use of fossil fuels
3. increased population in third-world countries
4. the solar flares reaching Earth
Answer:
2
Explanation:
Plate motion occurs as a consequence of convection in Earth's
crust
mantle
core
The movement of these tectonic plates is most likely caused by convection currents in the molten rock beneath the crust of the Earth. The immediate consequences of this tectonic shift are earthquakes and volcanic eruptions.
What effect does this plate movement have?Mountains will grow where plates converge or push together, and continents will split and oceans will form when plates pull apart or diverge. The Earth's geography has changed significantly over the span of millions of years as a result of the continents passively drifting with the plates.
What causes the mantle's plates to move?The plates fit tightly against one another and lie on the heated, molten rock of the Earth's mantle like fragments of a split shell.
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Bunnies: Black fur is dominant to white fur. Use the letter “B” and “b” to answer the following questions.
6. Complete the punnet square to show the possible offspring of a true-breeding black rabbit and a true-breeding white rabbit. (true breeding parents are homozygous, know this for the test!)
7. What ratio would you see in the F1 genotypes?
8. What ratio would you see in the F1 phenotypes?
9. If you crossed two of these offspring, what would this generation be called?
10. Cross two offspring from the F1 generation. (Complete your Punnett square on scratch paper)
a. genotypes:
b. phenotypes:
Answer:
they are all 100% heterogenous ,,their genotype is Bb,, their prototype is black fur
Explanation:
look at my demonstration
Question 6(Multiple Choice Worth 3 points)
(04.01 MC)
Starting with the European settlers, humans have introduced earthworms from Europe and Asia into North American forests. These introductions continue through the transport of soil that contains non-native earthworms, such as during construction and through the release of non-native earthworms used for fishing. The effects of non-native earthworms are especially large in forests that did not have any native earthworms. For example, forests of the Great Lakes region did not previously have earthworms until humans introduced them. When non-native earthworms are introduced, the thick layer of leaves, known as leaf litter, covering the ground disappears quickly, thereby altering biogeochemical cycles.
Which of the following correctly traces a nutrient pathway in a Great Lakes forest that is invaded with non-native earthworms?
trees → leaf litter → earthworm → atmosphere
leaf litter → earthworm → soil → trees
bird → earthworm → soil → trees
earthworm → fungi → leaf litter → trees
The correct trace nutrient pathway in a Great Lakes forest that is invaded with non-native earthworms is leaf litter → earthworm → soil → trees. The correct option is B.
What is a nutrient pathway?When there is an oversupply of food, nutrient-sensing pathways activate anabolism and storage, and when there is a shortage of food, homeostatic mechanisms including the mobilization of internal stores via mechanisms like autophagy are triggered.
Human metabolic illnesses frequently exhibit altered nutrient-sensing mechanisms.
Therefore, the correct option is B, leaf litter → earthworm → soil → trees.
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Answer:C
Explanation:
makes sense
Ravi is driving her car, hits a patch of ice, and momentarily loses control of the vehicle. Despite spinning in a full circle, Ravi manages to
avoid hitting any objects and drives away unharmed. Ravi experiences a surge of adrenaline and a racing heartbeat to due to the activation
of which of the following?
O sympathetic nervous system
O parasympathetic nervous system
O thyroid gland
O somatic nervous system
O pancreas
Ravi is driving her car, hits a patch of ice, and momentarily loses control of the vehicle. Ravi experiences a surge of adrenaline and a racing heartbeat to due to the activation due to Symphthetic nervous system.
What is Symphathetic nervous system?Autonomic nervous system includes the sympathetic nervous system. It might be referred to as your "automatic" nervous system because it controls a variety of processes that don't require conscious thought.
The ability of your sympathetic nervous system to react to risky or stressful conditions is its most well-known function.
When this happens, your sympathetic nervous system kicks in to help you escape danger by increasing your heart rate, pumping more blood to areas of your body that need it, and other responses.
Therefore, Ravi is driving her car, hits a patch of ice, and momentarily loses control of the vehicle. Ravi experiences a surge of adrenaline and a racing heartbeat to due to the activation due to Symphathetic nervous system.
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The state of a medium helps determine the speed of sound passing through medium
True. The speed at which sound travels through a medium is determined by the properties of that medium.
What do you mean by sound?
Sound is a type of energy made by vibrations that travel through the air or another medium, like water. It is sensed by our ears and interpreted by our brains. Sound is made up of waves that have different frequencies, which determine the pitch and loudness of a sound.
Factors such as temperature, pressure, composition, and density can all affect the speed of sound in the medium. For example, sound travels faster through warmer air than through colder air, and faster through denser materials than through less dense materials.
Hence, the statement is True.
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Complete question:
The state of a medium helps determine the speed of sound passing through medium.
State True or False.
What two forms of matter do plants absorb from soil in order to grow?
Answer:
liquid (water)
geses like hydrogen,oxygen etc.,
Answer: Nutrients and Water
Explanation: Plants actually need Nutrients as well as water which consists of hydrogen and oxygen from the soil to grow. Plants also need sunlight and carbon dioxide to grow. They get carbon dioxide from the air as carbon helps plant to build new stem, leaves, stems, and roots. And the oxygen they get from the carbon dioxide is used to build glucose molecules.
Nutrients provide plants with the strength which helps them to grow big strong and healthy.
Water helps to move the food and nutrients to all over the different parts of the plant.
Is iron malleable, ductile, or brittle?
Answer: Iron is both malleable and ductile .
Explanation:. (malleable) because it has the ability to be fold into any shape of material.
. and(ductile) because it is able to be deformed without losing toughness.
This is an example of radioactive isotopes in fossils
Carbon-14 is an example of radioactive isotope in fossils.
What are radioactive isotopes?Radioactive isotopes can be used to date fossils, as well as rocks and other geologic materials. The technique is called radiometric dating, and it involves measuring the levels of isotopes in a sample. Isotopes are variants of a chemical element that have the same number of protons but different numbers of neutrons in the nucleus. Some isotopes, known as radioactive isotopes, have unstable nuclei that emit particles and energy over time in a process called radioactive decay.
Radioactive isotopes such as Potassium-Argon and Uranium-Lead dating can also be used to date fossils and rocks.
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If a father is dominant for brown hair and the mother is dominant for brown hair, what would be the hair color of the offspring?
Answer:
The hair color of the offspring would be brown.
Explanation:
Briefly, explain how Tiktaalik could have existed in this Canadian environment.
Tiktaalik, an extinct fish species, could have existed in a Canadian environment due to the presence of shallow freshwater environments with low oxygen levels, which would have been suitable for its lung-like structure and ability to breathe air.
What is Tiktaalik?Tiktaalik is an extinct genus of fish that lived about 385 million years ago during the Late Devonian period. It is considered a transitional fossil, as it has characteristics of both fish and early tetrapods, four-legged land-dwelling animals. Tiktaalik could have existed in a Canadian environment, as it is known to have been found in the Canadian Arctic, specifically in the Elpistostege watsoni fossil beds of the Nunavut territory.
The environment during Late Devonian period in this region was a shallow freshwater delta or coastal plain that was home to a diverse array of fish and other aquatic organisms. Tiktaalik likely lived in the shallow water, and had adaptations such as flexible neck and fins with bones that resemble the limb bones of four-legged animals, which would have allowed it to move in shallow water and on land.
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