Which of the following is not an example of homeostasis?
a) after plunging into icy-cold water, gary's core body temperature rapidly drops.
b)while exercising, julia's heart rate and breathing increase to balance the increased oxygen use by her muscle cells.
c) on a hot day, to prevent dehydration, martin’s kidneys remove very little water from his blood.
d)after eating a candy bar, april's pancreas secretes insulin, which removes the excess blood sugar.

Photosynthesis converts solar energy into what type of energy?

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.

Question#29: why does the tropical ocean have a greater temperature range than the temperate ocean?