The principle of common descent with modification helps explain why ...
A
insects that live in different habitats have been modified, like a 'leaf-like praying mantis that lives in the forest
B
tigers are so different from cheetahs
C
well-adapted species have many offspring
D
conditions in an organism's environment ensures the organism's survival

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.

Which of the following types of stars are dim but can have high surface temperatures? giants main sequence stars supergiants dwarfs

The most famous fossil called archaeopteryx is which of the following? a dinosaur a fern a fish a bird