I think personal it is 6 but maybe other people have a better answer <span />
7. The correct answer is photosynthesis.
Autotrophs are organisms which produce food for themselves-from simple to complex molecules. In the case of photosynthesis, producers (plants or some algae) use the light energy to produce complex organic compounds (carbohydrates, fats, and proteins).
8. The correct answer is primary consumers.
Since the pioneer species are usually autotrophs because there is no other source of energy except light energy in the early stages of succession (after the eruption). Most likely, the primary consumer will appear next because they feed upon producers.
9. The correct answer is: they are different populations of fish.
Those two different kinds of fish have unique adaptations that enable them to survive and live in distinct environments. It is most likely that molecular changes underlie adaptation and speciation of those fishes.
Answer: C. Depletion of freshwater supplies
Explanation: The other answers are outcomes, C. is the only one that could be considered a “cost” for said outcomes.
First we must describe how immunity works. Immunity works by recognition of the antigen by macrophages or dendritic cells (antigen presenting cells) then presenting it to T cells and T cells will work to destroy the organisms with the specific antigen. B cells can also recognize antigens then secrete antibodies to combat organisms with the specific antigen. In the case of flu, or influenza, the genetic material of the virus mutates so often that the antibodies produced by the body against a certain strain of influenza will not work after some time because of the mutation of the virus.
