Answer:
Not sure but for billions of years. I don't think anyone can tell you an exact answer because it wouldn't make sense.
Explanation:
if someone else answers please give me brainliest it would be appreciated! <3
Answer:
peptide antigens by MHC class II molecules
Explanation:
Helper T cells are activated by peptide antigens by MHC class II molecules. These antigens express on the surface of antigen-presenting cells (APCs). After activation, the T helper cells divide and secrete cytokines to assist the immune response.
I would go with B) Nerves in the finger detect stimuli and send the message to the brain.
Answer:
A. the frequency will decrease because all mutations are harmful, thus People with the mutation will die.
No quite.... Homeostasis is the maintenance of constant internal environment
For example the constant internal temperature of our body is 37 degrees Celsius or 98.6 degrees Fahrenheit. If our body increases or decreases some changes happens to your body in order to return the normal body temperature. If your freezing your blood vessels near the skin constricts so that the heat running through your blood doesnt leave your body because you are in need of heat.
