Iceland is a volcanic island in the North Atlantic Ocean that lies between Greenland and Europe. To geologists, Iceland is a wonderland, filled with geologic activity such as active volcanoes, geysers, and earthquakes. In fact, there is a plate boundary that runs right through the middle of the island! Many scientists visit the island to study plate motion.

Have you ever heard of Iceland? Record what you know about Iceland in the space below. If you don’t know anything about Iceland yet, record what you observe about the photos of Iceland above.

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.

The theories on the expansion of galaxies maybe re-examined to strengthen science should not be tested to strengthen science will weaken scientific knowledge if they change will become laws if they don't change

Regarding most of the narrator’s story, which word best describes the tone?