Explain how you would construct a linkage map for a human chromosome. what data would you need?

Marianne is comparing two animals: a fruit fly and a fruit bat. she asks, "do a fruit fly and a fruit bat share a common ancestor in their evolutionary history? " according to evolutionary theory, what is the answer to marianne's question?

What did hunter gathers do to alter the environment?

Which layer will become saturated first when rain falls?