Answer:
A. Revise the hypothesis based on the results and use it to design another experiment.
From tiny blood cells/vessels!
Hope this helps!
<span>Robert Hooke was the first person to see cells.</span>
Answer: Characteristics: The fins are supported by rays, as the name indicates. In contrast to the cartilaginous fish they have a rigid skeleton. The swim bladder is also a unique feature of most ray-finned fish, enabling them to maintain buoyancy as they move up or down in the water.
