In HIV-infected patients, there is a gradual loss of CD4+ T cells over time. These cells, also called T helper cells, organize the immune system's attack on disease-causing invaders, like Salmonella.
Answer:
water because it has webbed feet
Explanation:
DNA<span> is a double helix, while RNA is a single helix. Both have sets of nucleotides that contain genetic information. </span>DNA<span> is a molecule that contains the instructions an organism needs to develop, live and reproduce.</span>
The answer is C.
Organism, population, community, ecosystem, biosphere
Answer:energy
Explanation:all activities of life including physical and chemical require energy to proceed
