Organisms compete for the resources they need to survive- air, water, food, and space. In areas where these are sufficient, organisms live in comfortable co-existence, and in areas where resources are abundant, the ecosystem boasts high species richness.
B) It requires energy
D) It involves the help of carrier proteins.
Answer: Growing a beard in males is an example of a sex-limited trait.
<span>C. obtain and use energy. </span>
