Answer: 4.543 billion years old
Explanation:
Answer:
1- C, evolution.
2- D, adaptation.
3-A, gene. (if it is multiple choice, then its A and B.)
4-E, fitness.
Add-on:
sorry if its incorrect, hope this helped you.
Answer:
The dendrites are important for receiving action potential or other stimulation in order for neurons to become activated. Dendrites are electrical signals that receive extensions of the cytoplasm. These signals come in two fundamental forms: inhibitory and excitatory.
Explanation:
<span>The tone, before conditioned to salivation, is simply a stimuli that the dog is responding to or ignoring in it's environment. Since it has no taught reactions to this sound, it is simply part of the environment the dog is in.</span>
