Question

a marine scientist has determined the age structure of a population of sea lions. what additional information does the scientist most need to predict whether this population is likely to grow in the near future?

a. the age at which sea lions begin to reproduce
b. the ages of the oldest population members
c. the current number of baby sea lions
d. the age structure from the previous year

Explanation:

Age - structure shows the number of individuals in different age groups. To predict population growth, knowing when reproduction starts (age of sexual maturity) is crucial. It helps determine how many individuals will contribute to the next generation. For example, if a large proportion of the population is at or approaching the age of reproduction, the population is more likely to grow. The ages of the oldest members (B) don't directly affect growth as much as reproductive - age information. The current number of baby sea lions (C) is part of the age - structure data already considered. The previous year's age - structure (D) is less relevant than the reproductive age for predicting near - future growth as it doesn't directly indicate reproductive potential.

Answer:

A. the age at which sea lions begin to reproduce