Natural selection acted on developmental regulatory genes that determine gill arch morphology..
Answer:
Gregor Mendel, through his work on pea plants, discovered the fundamental laws of inheritance. He deduced that genes come in pairs and are inherited as distinct units, one from each parent. Mendel tracked the segregation of parental genes and their appearance in the offspring as dominant or recessive traits.
Answer: how much does each contribute?
Explanation:
Nature and nurture of the pyschological traits such as intelligence or personality are contributed by the internal genes and the environment. The question arises is the fact that how much each factor that is the internal genetic structure as well as the external environment contributes to the development of these traits. It is the concern of the pyschologists.
Answer:
Eukaryotic cells contain membrane-bound organelles, such as the nucleus, while prokaryotic cells do not.
Answer:
A group of animals of all the same species in an area.
Explanation: