In terms of personal health, why should vegetarians still care about the misuse of antibiotics in livestock?
A) Food is often cross contaminated but it's better to have an easily treatable GI infection compared to an antibiotic resistant GI infection.
B) Livestock live happier lives without constantly eating antibiotics.
C) Recreational water activities become a source of infection when manure-contaminated runoff finds its way into these areas.
D) Manure-contaminated water and manure-based fertilizers introduce resistant bacteria into the food chain.
E) Manure-contaminated runoff is destroying aquatic life when this runoff gets into local waterways.
Answer: D
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If the fluid inside of a cell has a 5% solute concentration, what would happen if the cell was placed in a solution with a 10% solute concentration?
A. Water molecules would leave the cell by osmosis. B. Water molecules would enter the cell by osmosis. C. Water molecules would cross the membrane in both directions, but there would be no net movement of water molecules. D. There would be no movement of water molecules in either direction. E. Solute molecules would leave the cell by osmosis.
Antidiuretic hormone:
a. promotes processes that lead to an increase in the volume of urine b. makes the distal tubule and collecting ducts more permeable to water c. acts on the proximal tubules of nephrons in the kidney d. is produced by the adrenal cortex e. changes the water permeability of the ascending limb of the loop of Henle
Which of the following is NOT a general category of cell signaling molecules?
Endocrine signaling Enzymatic signaling Paracrine signaling Synaptic signaling
The two polynucleotide chains in a DNA molecule are attached to each other by
A) covalent bonds between carbon atoms. B) covalent bonds between phosphates and sugars. C) peptide bonds between amino acids. D) hydrogen bonds between bases. E) ionic bonds between "R" groups in amino acids.