Birds evolved from
a. insects.
b. a common ancestor with reptiles.
c. amphibians.
d. mammals.

When proteins are being produced by a cell, scientist say that the genes are question 2 options: activated turned off replicated deactivated

What do you need to use in order to work as an environmental scientist? you need to use the scientific method and__ in order to work as an environmental scientist.

Facilitated diffusion move large molecules and/or polar molecules across the cell membrane. what does facilitated diffusion use to do this?