Answer:
low levels of white blood cells
Explanation:
because HIV makes your body not be able to fight off diseases
The answer to this Question is A) nitrogen fixation
Answer:
Gene are a segment of DNA that codes for specific proteins. The chromosome is where the gene is stored or contained.
Explanation: You can look it p on google to understand better
They share lack of back bone, use tube feet to move, and I’m not sure about the open circulatory system because mollusks that fall into cephalopod category have closed ones but all others have open as well as echinoderms