Answer:
The "Cambrian Explosion" refers to the sudden appearance in the fossil record of complex animals with mineralized skeletal remains. It may represent the most important evolutionary event in the history of life on Earth.
Explanation:
enzymes are most considered as organic compounds and enzymes are considered to be catalysts because they catalyze chemical reactions meaning they decrease the activation energy which speed up chemical reactions
Answer:
they eat food because they need energy to do any activity or function that they get energy from food.
The answer would be D.) A milk-like substance secreted right after delivery.
Answer:
D.
Explanation:
because it doesnt have the same amount of g/ml