What are criticisms researchers may have of behaviorist and nativist theories of language development? (accidentally put this in biology, I meant psychology.)

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?

How can scientists test their ideas about the origin of the universe if they can't physically interact with or study?

Suppose a suitcase has a mass of (m) 30 kg and a net force (n) of 10 kg*m/s. what is the acceleration rate of the suitcasein m/s? show your work to support your answer