1. the idea that organisms shared a conserved, core processes can be used as evidence to explain that all life shares a common origin. which of the following describes evidence that supports this claim? . a-all organisms have dna and undergo transcription and translation. b-all organisms reproduce by carrying out sexual reproduction. c-cellular respiration take place in the cells mitochondria in all organisms . d-dna replication and reapir takes place in the cells nucleus. 2. which of the following represents one of the steps through which simple cells are hypothesized to have been produced?

Which of the following is an example of a tissue on the digestive system a.the stomach b.smooth muscle that lines the stomach c.nerve cells in the stomach d. enzyme molecules in the stomach

Heat from earths interior and pressure from overlying rock transform the remains of marine sediments into

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.