Answer:
I think the answer is C: An experiment that includes one group for which the scientist controls all variables
Explanation:
"Founding population arrives, biogeographic isolation occurs, genetic changes occur, reproductive isolation results" (Letter A)
Answer:
the answer to this question is the light colour
Answer:
The four- chambered hearts of birds and mammals are best described as <u>homoplasies.</u>
Explanation:
In evolution, homoplasies are the trait shared in different species despite that their ancestors didn't have it at all. In other words, these are traits that can be gained or lost during evolution in different lineages independently. For example, wings of birds and wings of bats do the same function (help in flying) but they were not there in the ancestors so both animals developed these structures independently.
In the given example, birds and mammals have four-chambered heart but their ancestors have 3 chamber hearts. They evolved independently and developed 4 chamber heart. This might be due to several reasons. However, their ancestors didn't have the feature so it is an example of homoplasy.
Ans.
Biological interactions include different types of interactions between organisms that reside together in a community.
Cattle egrets show interaction with domestic cows and feed on the insects present in them. The cattle egrets get food from the cows, while there is no benefit or harm to the cows. This type of biological relationship is known as commensalism, in which one organism, out of interacting organisms, get benefit, while other organism neither harmed or benefit.
Thus, the term that describes this relationship is 'commensalism.'
