These three groups are monotremes, marsupials, and the largest group, placental mammals.
Answer:
the amount of fossil fuels that are available will eventually decline
Answer:
Most animals obtain their nutrients by the consumption of other organisms. At the cellular level, the biological molecules necessary for animal function are amino acids, lipid molecules, nucleotides, and simple sugars. However, the food consumed consists of protein, fat, and complex carbohydrates.
Explanation:
