What two chromosomes do males have for gender?
(a) x chromosomes
(b) y chromosomes
(c) x and y chromosomes
(d) sperm cells do not contain sex chromosomes

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?

Mineral rich water heated by newly found oceanic crust escapes through cracks in the ocean floor called

What's the waste product of electrons and pyruvate combining in fermentation?