Which statement is true about levels of organization for living things A .organisms that are in the same kingdom are always in the same order
B. Organisms of the same species are always in the same class
C. Organisms that are in the same phylum have more in common Then organisms in the same order
D. Organisms that are in the same family have more in common than organisms in the same genius

In which case would a scientist choose to use a dissecting microscope rather than a compound microscope

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.

According to the cladogram, which organisms have roundworms as a common ancestor?