Given the distribution of the 30 or so animal phyla across the Earth's various ecosystems, what would be the most likely habitat for the origin of animals?
A. Oceans
B. Rain forests
C. Temperate grassland
D. Deserts
E. Freshwater habitats
Answer: A
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Match the choice:
A) AMP B) cytosine C) quaternary structure D) ribonuclease E) monosaccharide F) guanine G) adenine H) amino acid I) steroids J) starch K) spatial structure L) collagen M) linear structure 1) monomer of protein 2) polymer of glucose 3) pyrimidine 4) nucleotide 5) multimeric complex 6) Haworth projection 7) an example of a globular protein
The inhalation of cigarette smoke and similar pollutants has a gradual effect on cilia lining the respiratory tract, first causing the beating to slow and eventually stop. How does this change in cilia most directly impact the resistance mechanisms of the host?
A. Acquired immunity due to antibody response would be lost B. Innate host immunity due to mechanical barrier protection would be lost C. Both acquired and nonspecific immunity would be lost D. Neither acquired nor nonspecific immunity would be lost
Where does the lens FOCUS an image in the mammalian eye?
a. on the retina, using the entire surface of the retina b. primarily on the fovea c. on the rods only d. slightly in front of the retina, so the neural cells don't distort the image e. it depends on where you are looking; sometimes on the fovea, sometimes elsewhere on the retina
What does mRNA carry away from the nucleus?
A) Information B) tRNA C) Enzymes D) Ribosomes E) Amino acids