Question

wild fluctuations in their population size above and below carrying capacity. r - selected species have a generalized niche and rely on sheer numbers for survival. an example of an r - selected species are cockroaches. what are the two general categories scientists use to classify species reproductive strategies? x and y selected r - selected and k - selected red and blue selected a and b selected

Explanation:

In ecology, species' reproductive strategies are classified as r - selected (e.g., cockroaches with high reproduction and short - lived) and K - selected (species near carrying capacity, slower reproduction). The other options (X/Y, Red/Blue, A/B selected) are not standard ecological classifications for reproductive strategies.

Answer:

B. r - selected and K - selected