A cube is measured and has all sides that are 2 cm long. What is the SURFACE AREA to VOLUME ratio for this cube?

8

24

3

Which statement best describes a keystone species? o a. it has littlelmenetic variation. it has an extremely high population. 0 b. 0 c. it remains unaffected by all environmental changes. od. it has a strong influence on the ecosystem. 0 e. it's the first species to populate a new ecosystem.

Which medullary index indicates a human hair? a. 0.653 b. 0.733 c. 0.516 d. 0.256

This is a situation in which genes are attached to an organism's sex chromosomes; the sex of an organism influences the expression of a gene.