Dan took three samples of water from the creek behind his house once a month for the last six months. he tested the water and reported the results in the following data table. water quality indicator test results dissolved oxygen dissolved oxygen levels in the last three months decreased rapidly. fecal coliform fecal coliform ranges from a low of 89 colonies per liter to 102 colonies per liter over the six-month period. nitrates nitrate levels ranged from 6 to 7 mg/l. phosphates phosphate levels were between 0.01 mg/l and 0.3 mg/l. ph the average ph was 6.9. turbidity the water was clear in the first few months, but it became increasingly cloudy over time. which water-quality indicators would be of concern in this situation? explain your response. be sure to discuss any implications these water-quality indicators could have on the environment and human health

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.

Osmosis is often viewed incorrectly as a process driven directly by differences in solute concentration across a selectively permeable membrane. what really drives osmosis? view available hint(s)osmosis is often viewed incorrectly as a process driven directly by differences in solute concentration across a selectively permeable membrane. what really drives osmosis? the first law of thermodynamicsthe difference in the height of water columns on either side of a selectively permeable membranethe difference in water concentration across a selectively permeable membranethe difference in sugar or ion concentration across a selectively permeable membrane

In which squares should the phrase "green pods" appear a) a and d b) b and e c)a,c, and d d)a,b,c,d and e