Answer:
D. It controls the entry and exit of substances.
Explanation:
The cell membrane provides protection for the cell, transporting nutrients in and carrying toxic substances out.
Answer:
By continuolsly monitoring its internal conditions
Explanation:
Inbreeding can destroy the genetic variation that we get when two genetically different people reproduce. This can increase chances of birth defects.
Answer:
D. Biome
Explanation:
The most comprehensive ecological unit of the biosphere is the biomes. Biomes are the largest ecological unit of life.