Answer:
Speciation is the process by which new species form. It occurs when groups in a species become reproductively isolated and diverge. In allopatric speciation, groups from an ancestral population evolve into separate species due to a period of geographical separation.Explanation:
At rest the lens of the eye will be more round when the ciliary muscles are contracted true or false
Answer:
True.
Explanation:
Yes, the lens of the eye will be more spherical when the ciliary muscles are contracted due to tension. When the relaxation occurs in the ciliary muscle , the zonular tension is increased, that causes the lens to be flatten and leads to decrease in optical power while on the other hand, when the ciliary muscle contracts, the tension in the equatorial zonular is increased which causes the central lens surface to become more rounded that leads to increases central optical power.
Janine’s hands are larger than her father’s hands. Which explanation can account for the difference in hand size between father and daughter?
Janine’s large hands may be the result of a genetic mutation.
B
Janine inherited her mother’s hand size.
C
The difference in hand size may be due to an environmental cause.
D
Though some of the above are more likely than others, all of the above are possible explanations.
Answer:
D or b
Explanation:
Choose between those
how does energy drive the cycling of matter through different geological processes?
Answer:
Here is the link to answer
Explanation:
bit. ly/3a8Nt8n
The amphibian heart has a single, undivided ventricle, two atria, a sinus venosus, and a Conus arteriosus. Their sarcopterygian ancestors had hearts with all of these chambers, but the ventricle was partially divided and probably aided in separating pulmonary and systemic circulatory circuits. Check the following statements that could help us understand why amphibian evolution resulted in the loss of the partial ventricular septum.
A .The loss of the ventricular septum probably occurred because blood returning to the heart of amphibians bypasses the ventricle being shunted from the sinus venasus and right atrium directly to the pulmonary artery and lungs.
B. Loss of the partial ventricular septum reflects the fact that blood returning to the heart from the systemic circuit is often highly oxygenated because many amphibians rely on cutaneous and buccal gas exchange, as well as pulmonary gas exchange, much of the time.
C. Mixing of blood from the lungs with blood from the body in the ventricle is not a problem. Loss of the partial ventricular septum is not a problem because the spiral valve keeps systemic and pulmonary blood separate within the ventricle.
D. The Conus arteriosus of the amphibian heart receives blood from the right atrium and passes the blood on to the pulmonary circulation. This keeps oxygenated and nonoxygenated blood separate.
E. The slightly asynchronous contraction of left and right atria help keep systemic and pulmonary circuit blood separated in the ventricle.
Answer:
D. The Conus arteriosus of the amphibian heart receives blood from the right atrium and passes the blood on to the pulmonary circulation. This keeps oxygenated and nonoxygenated blood separate.
Explanation:
The conus arteriosus plays an important role in directing blood into the correct arterial arches in amphibian which keeps oxygenated and nonoxygenated blood separate from one another. The Conus arteriosus of the amphibian heart receives blood from the right atrium chamber of heart and passes the blood on to the pulmonary circulation which keeps oxygenated and nonoxygenated blood separate from each other and there is no need for partial ventricular septum.
Leucine biosynthesis occurs in a multistep pathway starting from 2-oxovalerate, and the final product of the pathway (leucine) inhibits the first enzyme involved in the biosynthetic pathway through a process called feedback inhibition. This enzyme inhibition occurs, regardless of whether or not the 2-oxovalerate substrate is bound in the active site of the enzyme. Describe what type of inhibitor leucine is and justify your response.
Answer:
it is a type of mixed inhibition referred to as 'non-competitive inhibition'
Explanation:
Mixed inhibition occurs when an inhibitor binds to the enzyme in a site different from the active site where the substrate binds (i.e., the allosteric site). The term 'mixed' is because this inhibition is a mixture of competitive inhibition, where the inhibitor competes with a substrate to bind to the enzyme, and uncompetitive inhibition, where the inhibitor binds only to the complex formed between the enzyme and its substrate. In competitive inhibition, the maximal velocity of the reaction (Vmax) does not change, whereas the apparent Km (i.e., the concentration of substrate which permits the enzyme to achieve half Vmax) increases. Moreover, in non-competitive inhibition, the Km does not change, whereas the Vmax decreases. Non-competitive inhibition is a special type of mixed inhibition where the apparent Vmax (V app-max) is reduced, while the Km of the enzyme is unaffected.
what are two different events that occur during metaphase?
Answer:
The next two major events that take place in mitosis are the alignment of chromosomes at the center of the cell and the subsequent separation of sister chromatids to opposite mitotic spindle poles. These two events occur in metaphase and anaphase, respectively.
Explanation:
Which cell has the largest problems due to surface area limitations
Answer:
Terms in this set (217) Thinking about the surface of cells, which of these cells has the largest problems due to surface area limitations? Eukaryotic cells are 10-100 times the size of prokaryotic cells.
3 alternative energy sources
sun, wind, atomic energy
sun, wind , rain
coal, oil, gas
atomic energy, coal, wind
There is an increased population of ground
squirrels in your town's park. How will this even affect mechanical weathering in the area?
Answer:
Explanation:
The ground squirrels will dig into the ground. This will break up rocks underground or bring the rocks to the surface, where it is exposed to other weathering forces.
Energy from the sun assists with the water cycle by:
A. Filling oceans
B. Precipitation
C. Water evaporating on Earth
D. Clouds becoming more dense
Choose one correct answer
Answer:
C
Explanation:
The heat of the sun provides energy to make the water cycle work. The sun evaporates water from the oceans into water vapor. This invisible vapor rises into the atmosphere, where the air is colder. The colder air causes water vapor to condense into water droplets and clouds.
Below are the ingredients of photosynthesis. Organize them to show what is used and what is produced
during this process.
carbon dioxide
water
oxygen
glucose
sunlight
_____plus_____in the presence of_____result in_____plus_____
5. Radioisotopes
Radioisotopes are isotopes that are radioactive—they spontaneously emit energy (or radiation) when their nucleus breaks down. The term for this process is radioactive decay. When the process involves a change in the number of protons in the nucleus, the atom can change into another element. In one type of radioactive decay, a neutron in the nucleus splits into a proton and an electron. This split decreases the number of neutrons by one and increases the number of protons by one, but since protons and neutrons have approximately the same mass, the mass number stays the same. Since the number of protons changes, the atom becomes a new element.
Carbon-14 has 8 neutrons and 6 protons. When this radioisotope undergoes the radioactive decay process discussed above, it becomes nitrogen-14.
The number of protons in nitrogen-14 is?
Answer:
7
Explanation:
The number of proton becomes 7 in nitrogen- 14 because there is one proton increase in the nucleus as a result of radioactive decay. There are 6 number of protons and 8 number of neutron in the nucleus of carbon-14 isotope. when the radioactive decay occurs, there is decrease occur in neutron number by removing one neutron and number of proton increases in the nucleus due to addition of one proton so that's we can say that the number of proton in nitrogen-14 is 7.
Many desert mammals have developed a nocturnal lifestyle. This means that during the day they sleep underground in their burrows, and they come out to eat and play at night. What is a good reason for a desert fox to show this pattern of behavior?
Answer:
A good reason why a desert fox shows this pattern of behavior is to protect themselves from cold conditions since at nighttime, it gets very cold in the desert!
Explanation:
Nocturnal is a type of animal behaviour shown when the animals are active at night time and inactive at daytime. Desert fox shows this behaviour so that it can avoid the hot daytime of the desert.
What is nocturnal behaviour?Nocturnal lifestyle is the behaviour adopted by animals that are active at night time and are inactive during the daytime. During the daytime, they rest in the cool burrows, holes and underground canals to prevent the loss of water and to protect themselves from the extremely hot environment.
The desert animals like desert foxes have adapted the nocturnal lifestyle to avoid the extreme heat during the daytime and sleep in their underground burrows. Instead, they come out during the night when it is cool in deserts to eat and play.
Nocturnal lifestyle is shown by the diurnal animals that rest and sleeps in the burrows, holes and cool places during the hot time of the day.
Therefore, the desert fox shows a nocturnal lifestyle.
Learn more about a nocturnal lifestyle here:
https://brainly.com/question/26769536
The rest of the group agrees with your conclusion that Dr. Tamm was likely exposed to a membrane uncoupling agent. Uncoupling agents allow protons to cross the inner membrane of the mitochondria, down their concentration gradient, without passing through ATP synthase. Consider that each respiring cell has a need for a certain amount of ATP, but in the presence of a membrane uncoupling agent, the proton gradient that is generated by the ETC is being partially dissipated without any ATP being made. How do you think the activity of other metabolic pathways might change in response
Answer:
No more reactions occurs.
Explanation:
The activity of other metabolic pathways also change in response to the proton which enters mitochondria without passing through ATP synthase because ATP synthase is responsible for the production of ATP molecules from proton. If this ATP is not produced no further reactions occurs in the cell. This ATP is used by the cells in various activities so if the proton does not pass through ATP synthase then no energy in the form of ATP is present for other metabolic pathways of the cells.
Principales of Biotechnology
What are the units you guys have? I want to study them
Some units includes Tools and Processes of Recombinant Technology which consists of many topics of DNA, ligase, PCR.
If you are interested in learning about the Principles of Biotech, you could get a headstart on khan academy. It'll help you prepare.
HELP ME PLEASE!!!!!!
Answer:
C of course
Explanation:
Cilia are involved in the transfer The genetic information from one bacterial cell to another
Answer:
False.
Explanation:
No, Cilia are not involved in the transfer of the genetic material from one bacterial cell to another. The pili are the structure which is responsible for the transfer of genetic material from one bacteria to another. This transfer can only occur for those types of bacteria that possess a special plasmid that is responsible for the formation of pilus which leads to the transfer of genetic material. If the special plasmid is not present so there will be no tranfer of genetic material from one bacteria to another.
Artesian springs bring pressurized groundwater to the surface through which feature of Karst topography?
streams
caves
fissures
igneous rock
Answer:
The correct answer is D) Fissures
Explanation:
Karst is a topography or landform that is created by the dissolution of soluble rocks beneath the surface by waters from the surface or below.
Fissures are formed when because of earth movements there is the occurrence of a long, narrow opening, in the earth.
Artesian springs refer to the water coming out through these cracks or openings in the earth onto the surface of the Karst topography.
Cheers
nutrient deficiency symptoms of plans
Explanation:
it depends on Which nutrients the body lacks l.however,there are some general symptoms you might experience.they include l:pallor,fatigue, depression,weakness,trouble breathing,unusual food craving,hair loss, constipation,etc
Rewrite as a simplified fraction. 1.5¯ = ?
Answer: 1 1/2
Explanation:
3) Write 3 sentences that explain how limiting factors can change the carrying capacity of
an ecosystem? (hint think in terms of a food web)
Answer:
Explanation:
human activities should no be more than the capacity of ecosystem
we should pay attention to carrying capacity of eco system
another one i don't no sorry for that
hope you like my answer and hope it helps you
You are a consultant for a second ELVIS mission to NPIP. Describe what physical and/or chemical treatments you would require prior to liftoff to minimize the opportunity for contamination of the ELV (the landing module of the spacecraft) and ELVIS (a new version of the robot) by Earth microbes. Hint: Keep in mind the following: ELVIS’s skin cannot withstand temperatures above 90°C; the ELV itself is approximately the size of a minivan and includes many metal parts. Use scientific terminology as you discuss this answer: e.g., are you trying to achieve disinfection or sterilization? Are you recommending use of antiseptics or disinfectants?
Answer:
As the consultant for the second ELVIS mission, my recommendations would be as follows:
Provision of standardized materials to the best of my knowledge and practice.Production and Development of look-alike skin from the variant of Lycra.Instruction of proper exercises such that the overall effect is minimized.Explanation:
In order to provide the necessary care in the limitations of the mission, the first step is to use the first mission of ELVIS as the starting point. The steps, precautions and lessons learnt from the first mission are used as stepping stones for the second mission.
Two parents, both heterozygous (Tt) and tall, are
crossed to produce offspring. What are the possible
genotypes and phenotypes of the offspring?
Answer:
1:2:1 is the ratio
Explanation:
well if you draw a punnet square you will get TT Tt Tt tt
Answer:
1:2:1 is the ratio
Explanation:
Please help!
We spent quite a bit of time discussion the various types of vaccines available this week, and how each of them compare and contrast with each other. However, ALL vaccines have a common purpose, regardless of how they aim to accomplish it. In YOUR OWN WORDS, tell me what that common purpose is. This is a short answer question and should be answered in a sentence or two, maybe three at the most.
Answer:
All vaccines work together to accomplish one main task and that is to prepare your body incase it gets invaded with a harmful virus that could cause you to get very sick. Vaccines are weak forms of the virus that are injected into humans so that the body can start creating the right antibodies to defend the body against the harmful virus.
I hope this helps! :)
24
An octopus reproduces only once in its life, but it may have more than 100,000 offspring, depending on the species. Certain
species of penguin, by contrast, have only one chick at a time.
If some species can reproduce as rapidly as the octopus (100,000
offspring every 3 or 4 years), how is it possible that a species that has only one young at a time is equally successful?
Answer:
The success of a species depends on the number of offspring that survive long enough to reproduce.
Explanation:
Study Island
PLEASE HELP!!!!!! :)
Answer:
C
Explanation:
may we please hel me
Answer: 17. epiglotti. 18. Salt. 19. 37 degrees celsius. brainliest??
Explanation:
[20 POINTS!!!!!]
which scenario would lead to the biggest increase in rabbit population?
increase in food supply and decrease in predators.
increase in food supply and predators.
decrease in food supply and increase in predators.
decrease in food supply and predators.
The scenario that would lead to the greatest increase in the rabbit population is increased food supply and decreased predators.
What are predatory animals?Predatory animals are animals that feed on other animals. They occupy the top of the food chain and are therefore found in smaller numbers. Predators are usually large, agile and adapted for hunting. A good predator is not known just by its size.
With this information, we can conclude that the scenario that would lead to the greatest increase in the rabbit population is increased food supply and decreased predators.
Learn more about Predatory in brainly.com/question/12751629
1. An organism's ___ shows what alleles they have for a particular gene, while the ____ is the physical expression of the trait. A. phenotype; genotype B. genotype; phenotype C. Genotype; allele D. Trait; allele
Answer:
I believe the answer would be B
6. Define allele, please help me out
Answer:
allele is the pair of gene controlling the pair of contrasting characteristics
Answer:
each of two or more alternative forms of a gene that arise by mutation and are found at the same place on a chromosome.
hope this answer helps you!