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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Part
A
Fill in the table using credible sources and your own experiences and past observations. If you're not sure what one of the
characteristics means, look it up on a credible website
A source is trustworthy if it was written by a subject matter expert, is error-free, and is objective.
How do I know if a source is credible?Peer-reviewed publications, governmental entities, think tanks for scientific study, and trade associations are examples of reliable sources. Due to their strict publishing standards, major newspapers and magazines also offer trustworthy information.
A reliable source is one that was authored without bias or inaccuracies by a subject matter expert in the field. This manual outlines the distinctions among reliable, scholarly, and peer-reviewed sources.
Take note of the three letters that follow the domain name, such as "edu," "gov," "org," and "com," which indicate the site is an educational, governmental, or nonprofit entity (commercial). Websites with the. gov and. edu extensions are typically trustworthy, but watch out for sites that are trying to trick you.
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answer is given from edmentum
Which term best describes the structure of a dragonfly with no bones and a bat with
bones?
O a. Homologous structures
Ob. Analogous structures
O c. Fossil records
O d. Vestigial structures
Fill in the blank with the best choice. "Continued labor trouble contributes to poor
a. Morale
b. Morel
c. Moral
Answer:
a. Morale
Explanation:
A. Makes the most logical since to me.
A herd of zebra currently has 45 members. Based on the available resources,
biologists estimate that the size of the herd will increase at a rate of 7% per
year.
Which of the following graphs models this relationship, if the x-axis
represents years and the y-axis represents number of zebra?
In this instance, the zebra population will grow by 7% year, which suggests that growth has been accelerating ever since the number was counted.
Where are zebras found in India?LUCKNOW: On Thursday, three zebras moved into the zoo's enclosure, which had been empty for the previous six years. The most widespread zebra species in the world is the Grant's zebra.
India bought the cheetah, right?A Boeing 747 will be used to transport the cheetahs. According to representatives from the ministry of environment, forest, and climate change, a total of Rs 96 crore has been set aside for the project (MoEFCC). Indian Oil has contributed an additional Rs 50 crore to the project.
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Which option is a renewable source of energy?
a.Petroleum
B. Wind
C. Nuclear power
D. Coal
Answer:
B. Wind
Explanation:
Because nature constantly replenishes the wind, we can continue to harness its power without worrying about running out of it.
Can a person have DID (Dissociative Identity Disorder) and BPD (Borderline Personality Disorder) at the same time?
Answer:
Yes, it is possible for a person to have both DID and BPD at the same time. According to the Diagnostic and Statistical Manual of Mental Disorders (DSM-5), a person can be diagnosed with both disorders if they meet the criteria for both.
Explanation:
what factors must be kept constant in the experiment to obtain valid results
What forms from the union of the sperm cell and the egg cell?
A.zygote
B.haploid cell
C.gamete
Answer: A
Explanation:
Put the following in order from
Oldest to Youngest
Unicellular Eukaryotes
Multicellular Eukaryotes
Heterotrophic Prokaryotes
Autotrophic Prokaryotes
From an evolutionary point of view prokaryotes preceded eukaryotes. Therefore it can be said that prokaryotes are older than eukaryotes.
Multicellular organisms evolved from the unicellular eukaryotes at least 1.7 billion years ago. Some unicellular eukaryotes form multicellular aggregates that appear to represent an evolutionary transition from single cells to the multicellular organisms.
The first life forms on earth were heterotrophs and atmosphere was reducing. The advent of first autotrophs also however did not immediately make the atmosphere oxidizing
The first life on the Earth began more than 3.8 billion years ago with individual cells that did not contain nuclei known as prokaryotes. These first living cells were heterotrophs meaning that they were dependent on the external nutrition sources
The earliest cells were probably the heterotrophs. Most likely they got their energy from other molecules in organic “soup.” However, by about 3 billion years ago new way of obtaining energy evolved. This new way was the photosynthesis.
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UIZ:
.01: Layers of the Atmosphere
Quiz 1.01: Layers of the Atmosphere
Chemicals released into the air from human activity, such as sulfur dioxide and nitrous oxide, interact with the atmosphere to make acid
rain.
in which atmospheric layer does this process happen?
O stratosphere
Othermosphere
Otroposphere
O mesosphere
1 2
3
Reading Off
4 5
Next >>
Chemicals released into the air from human activity, such as sulfur dioxide and nitrous oxide, interact with the atmosphere to make acid rain, troposphere atmospheric layer does this process happen.
Which layer of the atmosphere holds the majority of the air pollutants produced by human activity?The stratospheric ozone layer contains the majority of ozone. Over the entire world, the vertical extent or thickness of this layer varies with season and location. Air pollutants released by human activity cause ozone levels to rise close to the surface.
The major layers are the troposphere, stratosphere, mesosphere, thermosphere, and exosphere, listed from lowest to highest. Troposphere. The troposphere of Earth rises from its surface to a height of, on average, about 12 kilometers (7.5 miles), with its height being lower at the poles and higher at the equator.
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Ocean currents have a direct effect on climate by an interaction of which systems? (1 point)
O hydrosphere and atmosphere
O geosphere and biosphere
O geosphere and atmosphere
O biosphere and atmosphere
Ocean currents have a direct effect on climate by an interaction of ' geosphere and atmosphere'.
What is the atmosphere?
The atmosphere is basically the layer of gases surrounding the Earth. It is composed of nitrogen (78%), oxygen (21%), and trace amounts of other gases, such as argon, carbon dioxide, and water vapor. The atmosphere protects us from the sun's harmful ultraviolet radiation, helps keep temperatures moderate, and creates the weather patterns that make life possible.
Ocean currents act as a bridge between the atmosphere and the geosphere, transferring heat, moisture, and momentum between the two. This helps to regulate the global climate by moving warm water from the equator to higher latitudes and vice versa. This in turn affects air masses, cloud formation, and precipitation patterns, which can have a great impact on the climate. For example, warm ocean currents can strengthen cyclones, while cold currents can help prevent them. In addition, ocean currents can influence the rate at which heat is absorbed and released into the atmosphere, which can lead to extreme weather events like heat waves and droughts.
Hence, Option C is correct.
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Answer:
A) Hydrosphere and atmosphere
Explanation:
Took the quick check :)
The image does not show orders of insects. Suggest three categories of insects that would likely
be grouped into orders
Three categories of insects that would likely be grouped into orders include:
Beetles (Coleoptera)Flies (Diptera)Wasps, bees, and ants (Hymenoptera)What are insects?Insects are a class of invertebrates within the arthropod phylum that have a chitinous exoskeleton, a three-part body (head, thorax, and abdomen), three pairs of jointed legs, compound eyes, and one pair of antennae.
There are over a million known species of insects, which are found in nearly every environment on Earth and play important roles in ecosystems as pollinators, decomposers, and food for other animals. Some examples of insects include ants, bees, beetles, butterflies, and flies.
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a stock solution has been diluted at 16 fold. It is now 80 micro mol. What was the original stock concentration in Milli moles?
The original stock concentration in Milli moles will be nearly 1280 millimole.
What is concentration?
Concentration in chemistry is calculated by dividing a constituent's abundance by the mixture's total volume.
Mass concentration, molar concentration, number concentration, and volume concentration are four different categories of mathematical description.
The quantity of a substance, like salt, that is present in a specific volume of tissue or liquid, like blood, according to science. When there is less water present, the material becomes more concentrated.
(C1) (V1) = (C2) is the formula for determining a dilution (V2)
C1 = concentration of the starting solution.
V1 = volume of the starting solution.
C2 = concentration of the final solution.
V2 = volume of the final solution.
Here,
C1 = x
V1 = 1000 micro mol
C2 = 16
V2 = 80 micro mol
So,
1000x = 16 x 80
x = 1280/1000
x = 1.280
Thus, the original stock concentration is 1280 millimole.
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• Analysis of hemoglobin proteins obtained from an individual with Sickle Cell Anemia (SCA) has been shown to contain the following amino acid sequence. Using the information from part (A), identify which of the DNA sequences is normal and which is mutated, justifying your choice.
• Sickle Cell Hemoglobin Analysis: Met – Val – His – Leu – Thr – Pro – Val
Answer-
Sickle Cell Anemia (SCA) is caused by a single point mutation in the beta-globin gene, which results in the substitution of a single amino acid in the hemoglobin protein.
Based on the amino acid sequence provided, we can conclude that the DNA sequence in the beta-globin gene is mutated, as it codes for Val at the 6th position, rather than the normal GAG.
What is the Sickle Cell Anemia about?The normal beta-globin gene codes for the amino acid glutamic acid at the 6th position (coded for by the GAG codon), while in SCA the mutated beta-globin gene codes for valine at the same position (coded for by the GTG codon).
In the hemoglobin protein sequence provided, the 7th amino acid is listed as Val, which suggests that the corresponding codon in the beta-globin gene is GTG. This is the mutated version of the beta-globin gene that is responsible for SCA, while the normal version of the beta-globin gene would code for GAG at this position.
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QUESTION 1
Life has gotten much better in the last 100 years, yet people are not any happier. This statement characterizes the...
a. escape from freedom
b. the point/counterpoint phenomenon
c. the paradox of progress
d. modern society
This statement is characterized by the concept of the paradox of progress, as shown in option C..
What is the paradox of progress?It is a psychosocial concept.It's the term that describes bad results coming from good processors.Progress is something good and desired by all communities. This is because all people want to progress in their social and individual lives. After all, the results of progress tend to be good, uplifting, and promote many good things.
However, there is a paradox where progress triggers poor results in elements that worked better in the past. An example of this can be seen in communities that progressed over time but emotionally regressed, keeping more people unhappy than before.
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During which process of glass manufacturing does the glass flatten out?
Melting the Wax
Washing, drying, and cutting
Annealing
Floating on tin
Answer:
Floating on tin
What does it mean to have a mutation in a cystic fibrosis gene
Answer:In cystic fibrosis, a defect (mutation) in a gene — the cystic fibrosis transmembrane conductance regulator (CFTR) gene — changes a protein that regulates the movement of salt in and out of cells. The result is thick, sticky mucus in the respiratory, digestive and reproductive systems, as well as increased salt in sweat.
Explanation:
why the birds fly on v-formation
Answer:
There are two reasons birds might fly in a V formation: It may make flight easier, or they're simply following the leader.
Match the phase described
The cell cycle can be explained as a sequence of events by which a cell duplicates its genome, synthesizes other cell constituents, and eventually divides into two daughter cells.
explanation
The two primary phases of the cell cycle are
1. The interphase It is the phase between two successive M phases. It follows cytokinesis. It is divided into G1, S, and G2 phases.The DNA replication occurs in the S phase of the interphase2. The M phaseThe M phase has four stages
ProphaseMetaphaseAnaphaseTelophaseCytokinesis follows the M phase.
The prophase is the first stage of the M phase. Here, the initiation of condensation of chromosome material takes place. As a result of this, the mitotic spindle is developed. The metaphase is characterized by the complete disintegration of the nuclear envelope. And, the chromosomes move to the spindle equator. In anaphase, two daughter chromatids are formed from the chromosomes. Telophase is characterized by the decondensation of the chromosome material and the formation of two new nuclei (Karyokinesis) and as a result, the mitotic spindle disappearsThe cytokinesis is the last step. Here, the cell gets divided into two daughter cells. In animal cells, it can be achieved by the appearance of a deep furrow in the plasma membrane. However, plant cells require a cell plate as they are enclosed by a cell wall.ConclusionSo, the final answers are,
Interphase - Replication of DNA and follows the cytokinesis.Prophase - Formation of the mitotic spindleTelophase - Mitotic spindle disappears as two new sets of chromosomes arrive at the opposite poles.Cytokinesis - The cell is split into two daughter cells and plants require the formation of a cell plate.Answer true or false to the following statements. Use the graphic on the
back to determine the answers.
1. ______ Dogs belong to the order Felidae.
2. ______ A fox belongs to the phylum Arthropoda.
3. ______ Snakes belong to the phylum Reptilia.
4. ______ Lions belong to the class Mammalia.
5. ______ All arthropods belong to the Class Insecta.
6. ______ All rodents belong to the phylum Chordata.
7. ______ All amphibians belong to the class Reptilia.
8. _______ All primates are mammals.
9. _______ The class mammalia includes dogs, cats and rats.
10. ______ A lion belongs to the genus Felis.
11. ______ All mammals are primates.
12. ______ Insects and lobsters are arthropods
Classification is crucial as it allows grouping anything into specific categories.
The taxonomic hierarchy of classification is,
speciesgenusfamilyorderclassphylumkingdomExplanation:
Dogs belong to the order Felidae - FALSE
Dogs belong to the order Carnivora.
A fox belongs to the phylum Arthropoda - FALSEFox belongs to the phylum Chordata
Snakes belong to the phylum Reptilia - FALSESnakes belong to the phylum Chordata and class Reptilia
Lions belong to the class Mammalia - TRUE All arthropods belong to the Class Insecta - FALSEArthropods are invertebrate animals with an exoskeleton, segmented body, and jointed appendages. Although most of the arthropods are insects there are some exceptions like King crabs, Lobster, and Shrimp.
All rodents belong to the phylum Chordata - TRUE All amphibians belong to the class Reptilia - FALSEAmphibians have their class called amphibia and the class reptilia include a different class of organisms called reptiles.
All primates are mammals -TRUEThe class Mammalia includes dogs, cats, and rats -TRUEA lion belongs to the genus Felis - FALSELion belongs to the genus Panthera
All mammals are primates - FALSEA Primate is a placental animal that is characterized by having distinguished hands and feet and a well-developed brain. Examples are Apes and humans.
Whereas a mammal is a warm-blooded vertebrate animal. They include humans, lions, apes, dogs, etc.
Hence all primates are mammals but all mammals are not primates.
Insects and lobsters are arthropods - TRUEIn a solution of seawater, salt is which of these?
A. solute
B. compound
C. solvent
D. mixture
What role do neurons serve within the nervous system? Why is it so important?
Answer:
Neurons are electrically excitable cells that transmit information throughout the nervous system. They are the basic building blocks of the nervous system and perform a variety of functions, including receiving and sending signals, processing information, and controlling movement.
The nervous system is responsible for coordinating the body's activities and responding to its environment. without neurons, the nervous system would not be able to function properly. Neurons are essential for survival and play a vital role in our health and well-being.
Is there an impact on the environment if blue whales went extinct?
Answer:
Yes.
Explanation:
Blue whales are the largest animals in the world, and they are the apex predator in the ocean, meaning they help to regulate the population of other species in the ecosystem. As with any species, the loss of blue whales would cause imbalances in the food chain, which would have far-reaching effects throughout the ocean and its inhabitants. In addition, blue whales help maintain the balance of carbon dioxide in the ocean which could be lost if the species were to go extinct.
Write a summary paragraph discussing this experiment and the results. Use the following questions to help guide the content of your paragraph.
Submit your recorded observations for each step.
Step 1: Burning Candle - record the mass and write your observations
Step 2: Cooling Candle - record the mass and write your observations
Step 3: Tearing paper - record your observations
Step 4: Wet paper - record your observations
Step 5: Burning pieces of paper - record your observations
Step 6: Salt and water in test tube - record your observations
Step 7: Baking soda and vinegar - record your observations
Answer the following questions.
What is the difference between a physical change and a chemical change?
What kind of change occurred in each test? What evidence do you have to support your decision? Be brief, but be sure to defend your conclusion with data.
Answer and ill give brainly
Here the physical changes are seen in the burning candle, cooling candle, tearing paper, wet paper, salt, and water in the test tube, while the chemical reactions are involved in the burning of the paper and the mixing of the vinegar with soda.
What are the physical and chemical changes?The physical change is the change in form, such as when the candle is burned or cooled down, then the wax that is formed has the same properties as the candle, or the paper pieces after being torn have the same properties. Chemical changes involve the formation of new things, such as when paper is burnt, this produces ash with a different chemical nature, and when the vinegar and soda is mixed, it produces a different product.
Hence, here the physical changes are seen in the burning candle, cooling candle, tearing paper, wet paper, salt, and water in the test tube, while the chemical reactions are involved in the burning of the paper and the mixing of the vinegar with soda.
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5. Explain why these are termed so?
a. Saccharomyces for Yeast
b. Rhododendron for Laligurans
c. Spirogyra for Pond silk.
d. Polymorphism, Metamorphism & Metaphase
e. Apospory, apogamy, apomixis, cytomixis
f. Synandrous, Syncarpous, Syngenesious, Synapsis.
Answer and Explanation
a. Saccharomyces for Yeast: Saccharomyces is a genus of fungi in the family Saccharomycetaceae, and it is Latin for "sugar fungus." Yeast is a common type of fungus that ferments sugars to produce alcohol and carbon dioxide, so the genus name Saccharomyces is fitting for the species that make up this group of yeasts.
b. Rhododendron for Laligurans: Rhododendron is a genus of plants in the family Ericaceae, and is native to Asia. The name "Rhododendron" comes from the Greek words "rhodon" meaning rose and "dendron" meaning tree. The name refers to the many-petalled flowers that many of the species have.
Laligurans is a species of this genus, with beautiful flowers and found mainly in Himalayan region.
c. Spirogyra for Pond silk: Spirogyra is a genus of green algae in the order Zygnematales, commonly found in freshwater habitats. The name "Spirogyra" is derived from Greek words "spira" meaning coil and "gyros" meaning ring, referring to the spiral chloroplasts present in the cells. The common name "Pond silk" refers to the long, thin, green filaments that make up the algal mat.
d. Polymorphism, Metamorphism & Metaphase:
Polymorphism refers to the occurrence of more than one form of an organism in the same population.
Metamorphism refers to the process of transformation in the form of the organism during its life cycle.
Metaphase refers to a stage in the cell cycle when chromosomes align in the center of the cell during cell division.
e. Apospory, apogamy, apomixis, cytomixis:
Apospory refers to the development of a new individual from a cell other than a sperm or egg cell.
Apogamy refers to the development of an embryo from a cell other than a sperm or egg cell.
Apomixis refers to the development of a new individual from an asexual reproductive cell or structure.
Cytomixis refers to the mixing of genetic material during cell division.
f. Synandrous, Syncarpous, Syngenesious, Synapsis:
Synandrous refers to the condition in which multiple stamens are fused together, as in certain flowers.
Syncarpous refers to the condition where multiple carpels are fused together to form a single pistil.
Syngenesious refers to the condition in which the stamens are fused to the style, as in certain flowers
Synapsis refers to the physical alignment of homologous chromosomes during meiosis, leading to the exchange of genetic material.
1. Which of these are included in the biosphere? A) Landslide B) Plant pollen C) Glacier D) Volcanic gas
Answer:
B: Plant pollen is the only one included.
 a model of a change to the double strand of DNA molecule is shown here based on the illustration what describes the type of change and the effects of the change in the model of DNA select all answer choices that apply 
search sailesh xettri on messenger
Explanation:
bike pic guy
the illustration shows a model of the transport of soute particles from outside the cell to inside the cell. what type of cell transport is modeled
Answer:
The illustration shows a model of the active transport of solute particles from outside the cell to inside the cell.
Explanation:
Active Transport is defined as a process involving the movement of molecules from a region of lower concentration to a region of higher concentration against a gradient or an obstacle with the use of external energy.
This process is “active” because it requires the use of energy (usually in the form of ATP). It is the opposite of passive transport.
An example is the phagocytosis of bacteria by Macrophages.
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HELP LIMITED TIME!!!!!!!!!!!!!
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 increased use of fossil fuels
period when cell is not engaged in division
Interphase is the period of cell cycle in which the cell is not engaged in any kind of cell division. This phase is marked as the preparatory phase for the actual cell division.
What is Cell cycle?The cell cycle is a series of steps during which the chromosomes and other cellular material double to make two copies of the genetic material. The cell then undergoes division to form two daughter cells, each of the daughter cell receiving one copy of the doubled chromosomal material. The cell cycle is complete when each of the daughter cell is surrounded by its own outer membrane.
The interphase is the period when the cell is in a non-dividing state of the cell and this phase can be in different stages: the first gap (G1) between the last mitosis (M) and the S-phase (phase of DNA synthesis) and the second gap (G2) phase between the completion of the S-phase and the next mitosis (M).
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