Carbon dioxide is a greenhouse gas that allows Earth to maintain temperatures that can support life. A variety of factors can change the amount of carbon dioxide in the atmosphere and alter Earth’s climate. An increase in carbon dioxide concentration can increase average global temperature. a. Forests can be cleared or burned to prepare land for raising crops or livestock. Describe three connections between agricultural practices such as these and the global climate. (3 points)

Apea plant that is heterozygous for the tall phenotype can produce short offspring when self pollinating. which of the following explains why this occurs? a. segregation of allels b. condominance of traits c. polygenic expression of traits d. independent assortment of alleles

Suppose that on a small island off the coast of scotland, 32 percent of the population has blue eyes, which means that these individuals must be homozygous for the blue eye color gene (bb). the only other eye color found on the island is brown, and individuals that are homozygous for the brown eye color gene (bb) or heterozygous (bb) will have brown eyes because brown is the dominant gene. assume this population is in hardy-weinberg equilibrium. if 100 babies are born next year, how many of these would you expect to have brown eyes and be heterozygous? a. 58 b. 49 c. 29 d. 43

Which particle controls what element an atom is?