Darwin finally published the Origin of Species in this year _________.

A comparative review across the animal world reveals that homosexual behavior is common. However, long-term or exclusive homosexual preference is infrequent except in

The second part of a binomial name is known as what?

The key difference between internal and external fertilization in animals is that

Which of the following pairs of species are thought by biologists to be most closely related to each other?  

Species A and B are in the Mustelid family. Species A and C are in the Carnivore order. Can you tell whether Species B is in the Carnivore order?

The copy-paste function on a word processor is like what kind of biological reproduction in humans?

When we identify species by a Latin name made of genus and specific epithet, we are using trinomial nomenclature.

Which of the following is NOT a sexual orientation?

An explanatory idea in science that is broad in scope and is supported by a large body of evidence is called