Answer:
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Blue green algae are used to prepare bio fertilizers .</em></u></h2><h2><u><em>
Neem leaves are used in grain storage as bio pesticides .
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Turmeric is used in grain storage as bio pesticides .</em></u></h2>
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Answer:
The primary purpose of the cardiorespiratory system is to deliver adequate amounts of oxygen and remove waste from body tissues . The purpose of cardiovascular regulation is maintaining adequate blood flow to all body tissues. In addition, the circulatory system transports nutrients and aids in temperature regulation. During exercise, the demand for oxygen to the muscles is 15 to 25 times greater than at rest. The heart cannot accomplish this by itself, and does not work in isolation. The respiratory system and the circulatory system function together as a “coupled unit” delivering the body’s oxygen and nutrients and taking away carbon dioxide and wastes to maintain homeostasis.
The most common circumference to be expected in this situation is 2 cm.
Since it is given that the original population of oak trees contains acorns with the most common circumference of 2 cm, thus, the same circumference will be favored after 15 generations of stabilizing selection.
Stabilizing selection occurs when natural selection results in stabilization i.e. large number of individuals attain mean or average value for a particular trait. In this process, phenotypes of medium-sized individuals are favored through natural selection.
Since it is already mentioned that the mean circumference is 2 cm in the original population thus the same value will be expected after 15 generations of stabilizing selection.
To learn more about stabilizing selection here
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OPTIONS:
1. reproductive isolation
2. sympatric speciation
3. habitat isolation
4. prezygotic barriers
Answer:
All of the above
Explanation:
First, let us consider the definition of the above listed terms in the question and see each come to play in the hypothetical situation.
Reproductive isolation occurs when two similar species become prevented from mating together as a result of environmental barriers. This can be seen in the flea population, as they become separated by ecological barrier, since some now live on pronghorn antelopes, while others live on cattle.
Sympatric speciation is a speciation that occurs when new species evolved from an ancestor that they share the same geographical region together, but dwell in overlapping different ecological area.For example, fleas that have preference for cattle blood evolved from pronghorn antelopes fleas, as their ancestor. The two species both dwell in overlapping ranges but still in the same rangeland.
Habitat isolation is a barrier that prevents two species from interbreeding as a result of differences in where they live. For example, fleas on cattle cannot interbreed with fleas on pronghorn antelopes.
Prezygotic barriers are reproductive mechanisms that prevent fertilization. Habitat isolation is an example of prezygotic reproductive mechanism that prevents fertilization to take place between fleas on cattle and fleas on pronghorn antelopes.
Nearly 97 % of water from plants is lost through stomatal transpiration, so the more stomata, the higher the transpiration rate.
