Which type of environment would tend to reduce genetic variation in a population because of evolution by natural selection? grasslands that are undergoing severe drought
an ocean ecosystem that is becoming more acidic
an old growth forest with trees that are over 1,500 years old
a tropical rainforest that is being deforested for farmland

Can a trait be both polygenic and have multiple alleles? explain why or why not.

Select the star life cycle that is accurate

How is anaerobic respiration affected by changes in temperature? (5 points)based on the conditions of early earth, what conclusion can you draw about the amount of anaerobic respiration that was occurring at earth’s beginning? explain your answer.(5 points)if there was a sudden drop in temperature after the evolution of the first living cells, predict how that might have affected the changes in the atmosphere and the evolution of cyanobacteria and other autotrophs. explain your answer. (5 points)