I am not sure but I think the answer would be A. Since where they live caused them to need to adapt.
Fish breathe by drawing water in their mouths and forcing it out of the body via a number of gill slits. The gill slits are rich in blood vessels, enabling the direct absorption of oxygen. While all fish have gills, some fish are also able to extract oxygen from the air via gulping.
Most fish have swim bladders that are permanently sealed, but other fish have swim bladders that can hold varying amounts of air. Salmon have open swim bladders, and they must gulp air at the surface to keep them full. Some fish, such as sharks, lack swim bladders entirely. This causes them to sink if they do not maintain forward motion.
Fish have fins that are adapted to their lifestyle. Some have evolved into long, barbed structures, suitable for defense. Other fish have fins suited for achieving great speed or for walking along the bottom of the ocean.
Preganglionic neurons of the sympathetic nervous system are located in the lateral gray horns of segments T1 to L2 of the spinal cord.
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Hello there,
The reason <u>Enzymes</u> are considered a <u>catalyst</u> is because Enzymes catalyze biochemical reactions.
<u>Enzymes </u>which are proteins that control the speed of <u>Chemical reactions</u> in your body. With out them, The chemical reactions would take place Very slowly to keep you alive.
Hope this helps
It would most likely be A. 10grams considering grams is the smallest and we are talking about a feather.
