Take the 2-minute tour ×
Biology Stack Exchange is a question and answer site for biology researchers, academics, and students. It's 100% free, no registration required.

There are quite a lot of diversity in behaviors of animals and lesser organisms, like mating, hunting, feeding, hiding and avoiding predators.

At the same time I know that many hormones like melatonin are present in a variety of organisms.

This makes me interested if animal behaviors did all arise and specialized independently, or did all behavior arise from some primitive response that some "common ancestor" possessed ?

For example, a primitive organism has no concept of predators and can only feed and procreate. Slowly, a predator appears in the ecosystem. Over time, how would the "escape predator" behavior appear in such organism? Would the mating behavior be modified for defense?

share|improve this question
add comment

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Browse other questions tagged or ask your own question.