Mindy wants to find out the average distance that each of her six friends can
throw a ball. She asks six friends of similar
sizes and ages to throw a ball as far as
possible from the same starting point.
Mindy notices that one friend throws the
ball much farther than the other five do.
She wants her results to be accurate. What
should Mindy do?
F Repeat the experiment for the person
with the unusual result.
G Repeat the experiment using a
different friend as a replacement.
H Repeat the experiment and ignore the
results of the first experiment.
I Repeat the experiment two more
times, and find averages for each of
the six throwers.

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.

What is it called when lava when it erupts from the surface through volcanoes.

Which of the following would most directly interfere with sperm production? ingestion of a substance that mimicked inhibin interruption of sustentocytes' production of abp low sperm count use of synthetic steroids (testosterone)