I think it would either be c or d...
Why is the active site specific for only one type of substrate? Enzymes have a lock and key type fit so only a specific substrate fits in the activation site.
Answer:
It has the right amount of all essential things.
Explanation:
has the right amount of oxygen, gravity, food resources and systems (photosynthesis, cellular respiration,etc.)
Answer:
d their coats will become darker due to natural selection
Explanation:
