What is the natural tendency of molecules to spread from an area of high concentration to an area of low concentration?
A. Vesicle
B. Passive transport
C. Diffusion
D. Active transport

Mike has a problem with his testosterone. he is unable to produce enough. which will most likely be affected by his inability to produce testosterone? check all that apply.

Dna. we have heard that we are a product of our dna. but where is it? how do we "get" our dna? it is passed to us, from our parents, but in what form? several vocabulary words associated with inheritance are used interchangeably and sometimes, incorrectly. let's see if you can clear this up for someone just learning about inheritance and cell structure.

Penelope studies how the structure and function of the nervous system is related to behavior. she is a psychologist