I honestly think it would be A.
Answer:
two
Explanation:
Double-stranded RNA (dsRNA) is RNA with two complementary strands, similar to the DNA found in all cells, but with the replacement of thymine by uracil.
Deoxygenated blood leaves the heart and goes to the lungs and then re-enters the heart.
The chemicals would mix within the atmosphere and combine with water forming acid rain, your answer is D
Answer:
Everything in Earth's system can be placed into one of four major subsystems: land, water, living things, or air. These four subsystems are called "spheres." Specifically, they are the "lithosphere" (land), "hydrosphere" (water), "biosphere" (living things), and "atmosphere" (air).
So I would say seaweed belongs in the hydrosphere.
I hope it helps.