Genetic variation that occurs in sexually-reproducing organisms is mostly related to which of the following scientific laws?

I. the law of conservation of energy
II. the law of independent assortment
III. the law of segregation
IV. the law of universal gravitation
A.
I and II only
B.
II and III only
C.
II, III, and IV only
D.
I and IV only

Legumes, a type of plant, require rhizobia, a type of soil bacteria, to survive since these organisms fix nitrogen during photosynthesis. rhizobia use the legumes for food. what would most likely happen to the legume population if rhizobia suddenly became extinct?

How is the national wildlife refuge system similar to the pacific region coastal program? a. both programs are concerned with providing habitats for wildlife b. both programs are primarily concerned with preserving fish species c. both programs have set aside 150 million acres of land d. both programs are under the u.s. fish and wildlife service

Which of the following describes a difference when gram-positive bacteria are compared to gram-negative bacteria?