What are the positive or negative effects on survival and reproduction of individuals as relating to their expression of a variable trait in a population?

"acknowledging a right to benefit from the presence of animals requires government action to ensure human access to animals in a number of different spheres," writes jessica pierce, ph. d., in psychology today. the pragmatic meaning of the term "right" in this statement is

This aquarium exhibits biotic and abiotic factors in an aquatic environment. one of the abiotic factors is

9. the history of life on earth is recorded in