The central nervous system is comprised of

An observational field study allows scientists to gain information about how things occur in behavior or in nature.

A pheromone is: A: A substance that only is used when an animal is in danger. B: A type of equine. C: A chemical that can alert other living things. D: A brain wave

Which describes a likely advantage of the roots that gymnosperms have?

What advantage did the development of bipedalism most likely confer to early hominids? A. It allowed them to see with binocular vision B. It allowed them to evolve an opposable thumb C. It allowed them to evolve a complex social structure D.

Which of the following aquatic environments would not freeze in winter? a. lake b. pond c. salt marsh d. stream

Which statement best describes the relationship between activation energy and rate of reaction? O Increasing the activation energy can increase the rate of a reaction. O Reducing the activation energy can increase the rate of a reaction.

Definition: this is a haploid cell with half the reproductive information from the parent.

Does a cell use energy when molecules diffuse in or out of the cell? Why?

Below is a list of possible challenges. Check all errors that you mentioned in your answer. Traits other than beak type might affect natural selection. It could take many generations to observe adaptions to a population.

A farmer dug a well but did not find any water Which reasons most likely explain why the farmer did not find water? Check all that apply.