Biology<span> focuses on deeper logic and is mostly related to nature such as what is happening in our bodies or in plants, whereas </span>physics<span> focuses on more technical things such as pressure, forces etc. hope that helped</span>
The Calvin Cycle is a stage in photosynthesis
Cant see the following animals
The discovery of the cell was possible do to the invention of the Microscope.
I would go with B & D because they change over time and they can go extinct like those big octopus in the oceans, they are rare to see in my opinion because they can blend in with other things that keeps them away from danger.