Definition: This is a type of protein found in the cell membrane, which regulates the coming and going of substances into or out of the cell. Example: Like little doors, , open and close to allow substances into or out of a cell.

Which phrases describe an extrusive rock? check all that apply. fine texture cooled slowly small crystal size found deep underground different, easily observed minerals

What must be true for natural selection to heppen

Need an answer asap 45 points and brainlest to the first person to answer why do scientific theories, such as biological and chemical evolution, represent the strongest explanation of the changes observed in the fossil record. must be in sentence form how can scientific theories on evolution and the fossil record change over time? must be in sentence form