Answer:
It looks like a type of mosquito...m not sure
Explanation:
A. It has mass.
Air is matter, and can't be seen thus not all matter can be seen.
Any liquid or gaseous is matter (water, air, etc.)
Since it can be liquid or gaseous it doesn't have to maintain it's shape and size to be matter.
DNA probably. It might be one of the latter rungs too, thymine, and 2 others I forgot
Carbon dioxide and oxygen are two molecules that undergo this simple diffusion through the membrane.
Osmosis i believe, but it may be <span>turgor pressure
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