Answer: number 1
Explanation: that is when we could first sustain life because that is when we gained atmosphere and when we could hold carbon and oxogen
230 is your anwser! sorry bad english
It starts with a seed, than when the seed is on the ground it germinates.
Answer:
Facilitated Transport.
Explanation: In facilitated transport, also called facilitated diffusion, materials diffuse across the plasma membrane with the help of membrane proteins. Hopefully this helps!
A control variable is a scientific experiment in which the experimental element is unchanged throughout the experiment
a control group is a group in an experiment that does not receive the treatment by the researchers (untouched by them) and used to see the changes between the controlled group and that of the group that received the vial
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