Agroup of runners gathers every week to train for long-distance runs. several students in your anatomy class are part of this group. your classmates are curious about the physiological changes that occur with exercise. you do a little research in class and find several changes occur as exercise begins. which of these correctly lists the changes that occur as exercise begins?
a) increased vasodilation, increased cardiac output, increased venous return
b) decreased vasodilation, decreased cardiac output, decreased venous return
c) increased vasodilation, decreased cardiac output, increased venous return
d) increased vasodilation, increased cardiac output, decreased venous return

Considering the yellow and green pea color phenotypes studied by gregor mendel: a. what is the biochemical function of the protein that is specified by the gene responsible for the pea color phenotype? (1 point) b. a null allele of a gene is an allele that does not specify (or encode) any of the biochemical function that the gene normally provides (in other words, either no protein at all or only non-functional protein is produced from it). of the two alleles, y and y, which is more likely to be a null allele? (1 point) c. in terms of the underlying biochemistry, why is the y allele dominant to the y allele? (2 points) d. why are peas that are yy homozygotes green? (1 point) e. the amount of protein produced from a gene is roughly proportional to the number of functional copies of the gene carried by a cell or individual. what do the phenotypes of yy homozygotes, yy heterozygotes, and yy homozygotes tell us about the amount of sgr enzyme needed to produce a yellow color? explain your reasoning. (2 points)

How can antibodies "remember" a particular bacterial invader or "antigen" on that invader?

Explain why ecosystem diversity results in species diversity in a healthy biosphere