Answer:
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Explanation:
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Taking in oxygen is very important because it allows your cells to do things, like make energy from the food you eat. Plants 'breathe' too, but they do it through tiny openings in leaves called stomata. Stomata open and close to allow the intake of carbon dioxide and the release of oxygen.
A.
Most of the rain is evaporated ocean water
The main answer wold be diversity.
When you think about it, you only have a triplet code (which requires much less physical space than having all 64 possible codon combinations already present but either turned off or on). It makes much sense to have less actual physical compounds which can be combined in different ways (and a lot of ways) and produce the variety that can be required.
Hello!
1) Echinoderms
2. A.) Jawless fish have cartilaginous endoskeleton while Bony fish have a bony endoskeleton.
2. B.) Jawless fishes gills are exposed to the outside while the bony fish gills covered by operculum
I hope it helps!