Under ideal conditions, how do allele frequencies change over time? A. The alleles eventually reach a 50/50 balance.
B. The frequency of the dominant allele increases over time.
C. The frequency of the recessive allele increases over time.
D. The allele frequency reaches equilibrium over time.

poor water quality affects most estuarine organisms, including commercially important fish and shellfish. the pollutants that have the greatest impact on the health of estuaries include toxic substances like chemicals and heavy metals, nutrient pollution (or eutrophication), and pathogens such as bacteria or viruses.

the correct answer is option b

behavioral response need communication and thus co-ordination at several levels such as interaction among cells, organ system and the entire organism.

behavioral response produces both internal and environmental stimulus.

it's c. (to reduce the greenhouse effect/carbon gasses)