Most scientific questions are based on
1.) opinions.
2.) hypotheses.
3.) observations.
4.) experimental data.

What kinds of molecules can pass through the cell membrane without any problem?

The dense layer of connective tissue that surrounds an entire skeletal muscle is the

Alexa is preparing for a presentation by creating note cards identifying keywords that describe various features of each type of plate boundary. which words apply to all three of the convergent boundaries?