Many children were paralyzed by polio in the 1950s. Today, polio has been reduced by 99 percent. Which statement best explains how this disease has been almost eradicated?
A) Independent behavior helps humans live self-sufficiently and solve their own problems.

B) human communities use their ecosystems in creative ways.

C) human communities are learning to live with less money and fewer possessions.

D) Group behavior helps humans cooperate in order to accomplish large, complex tasks.

Two pea plants with yellow peas are crossed. most of their offspring have yellow peas, but about 25 percent of the offspring have green peas. for pea color, yellow is the dominant trait and green is the recessive trait. what does this tell you about the two parent plants? a. the parent plants have only dominant alleles for pea color. b. the parent plants are heterozygous for pea color. c. pea color follows an incomplete dominance pattern of inheritance. d. the parent plants are homozygous for pea color.