The state of maintaining a stable internal environment regardless of changing external conditions is called
.

D.
Glucose is energy, which means it breaks down when energy is consumed. When a fox consumes it's pray, a seagull glides trough the air and a duck rests on a pond, not much glucose is consumed.
Energy is used when physical effort is necessary, and running from a predator, requires a lot of energy.
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Okay I'm not that smart. But I'm pretty sure it's B since people get salmonella food poisoning by... eating
Microscope allowed us to find known parasites, micro living things.
Technology allowed us to inherit knowledge on different plants and animals