Answer AND Explanation:
A steroid is an organic macromolecule that is biologically active with four rings arranged in a specific molecular configuration. Steroids are important components of cell membranes which alter membrane fluidity and act as signaling molecules. The two main types of steroids are corticosteroids and androgenic steroids like testosterone and estradiol.
Dendrites is 1
Soma is 2
Nylon sheeth is 3
Node of Ranvier is 4
Synapse is 5
Answer: genetics and mutation generate some of the variety that natural selection acts on
Explanation:
I think the correct answer from the choices listed above is option A. It is the alveoli that is composed of single layer <span>surrounded by a network of capillaries. These are used to allow oxygen and carbon dioxide to move from the lungs to the bloodstream.</span>
Answer:
C.
Explanation:
This is because cellular respiration produces C02, which photosynthesis uses.
