Which scenario describes a physical change?
The bright blue color of a concentrated copper (II) sulfate solution fades as it is diluted by the

addition of water.

When a solid copper penny and a solution of nitric acid are mixed, a reddish-orange gas is
produced.

When hydrochloric acid is poured over white pellets of sodium hydroxide, the pellets dissolve,
and the solution is warm to the touch.

When two clear solutions of lead (1) acetate and potassium iodide are mixed in a test tube, a
bright yellow precipitate forms. a

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.

How does human environment effect the biosphere

Match each term to its best definition? sedimentary depositional enviornment