PLEASE HELP Neurotransmitters can best be described as
A. electrical charges. B. chemical messengers. C. actions. D. reflexes.

Which are reasons cells undergo cell division?

Rarefaction is used for which of the following? a. creating a representative sample b. studying how disease impacts populations c. rediscovering species thought to be instinct d. determining which sea creatures live in an area

Which diagram best represents the chromosomes that would be found in a two new skin cells produced as a result of this process?