In the disease elephantiasis, lymph vessels become blocked as a result of infection with parasitic worms. Which of the following processes would be impacted by this disease?
A. the return of excess interstitial fluid to the
bloodstream
B. the diffusion of water and small molecules
across the wall of the capillary
C. the flow of water back into the capillaries
by osmosis
D. the generation of pressure to filter
materials through the capillary walls
E. the exchange of oxygen and other
materials between the blood and body cells
Ans: A. the return of excess interstitial fluid to the
bloodstream
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The graph here shows the results of growing one strain of a crop plant on soils with different nitrogen contents. If a different strain of the same plant were grown on the same soils, you would predict that:
A. it would respond the same way to nitrogen supplementation because they are the same plant. B. it would respond completely differently to nitrogen supplementation because they are different strains. C. it could respond the same way or differently; different genotypes can, but may not always, respond differently to the same range of environments. D. it could respond the same way or differently; the environment has too many variables to predict. E. None of these choices is correct.
Which of the following best distinguishes between annuals, biennials, and perennials?
A. how tall they grow B. the number of flowers they produce C. the amount of root development D. the environment they grow in E. the time from seed germination to seed production
Why are viroids resistant to nucleases?
A. Having a circular RNA "genome," they are resistant to the digestion of most exonucleases (that nibble/digest the free ends of RNA or DNA). B. Having a circular RNA "genome," with no protein shell, they are resistant to the protein-degrading activities of nucleases. C. Nucleases will only digest DNA, not RNA-so viroids are protected. D. Viroids have only been identified in plants. Plant nucleases cannot digest RNA.
Alison was looking at a tissue under a microscope. It had cells within lacunae, and the matrix was glassy-looking. What type of tissue was she looking at?
A. adipose B. areolar C. bone D. blood E. cartilage