In northern Canada, a population of rabbits was predominantly white in color. The allele for white color is recessive, while the allele for gray color is dominant. Over the last several decades, the average annual temperature of this area has increased, and the long-term deposits of ice and snow have become scarce. We see the result of this change in the graph above. How can we explain this change in terms of allelic frequency? A) Gray alleles are dominant over white. B) Changes in the environment caused genetic mutations that were passed to offspring. C) In order to survive, rabbits changed from white to gray and they passed the gray allele to offspring. D) Gray rabbits were more likely to survive in the changed habitat. The gray alleles were passed to offspring.

Mouse liver cells were homogenized and the homogenate subjected to equilibrium density-gradient centrifugation with sucrose gradients. fractions obtained from these gradients were assayed for marker molecules (i.e., molecules that are limited to specific organelles). the results of these assays are shown in the figure. the marker molecules have the following functions: cytochrome oxidase is an enzyme involved in the process by which atp is formed in the complete aerobic degradation of glucose or fatty acids; ribosomal rna forms part of the protein-synthesizing ribosomes; catalase catalyzes decomposition of hydrogen peroxide; acid phosphatase hydrolysis monophosphoric esters at acid ph; cytidylyltransferase is involved in phospholipid biosynthesis; and amino acid permease aids in transport of amino acids across membranes. a) name the marker molecule and give the number of the fraction that is most enriched for each of the following cell components: lysosomes; peroxisomes; mitochondria; plasma membrane; rough endoplasmic reticulum; smooth endoplasmic reticulum.

Building glycogen from glucose molecules is an example of what

Which type of landform forms at the plate boundary as a result of divergent stress