What is the relationship of food webs to biological magnification of toxins?
What will be an ideal response?
ANSWER: When there are toxins present in the soil, water, etc., they are absorbed into organisms in the
bottom of the food chain. Progresses up the food chain, the amount of toxins present will
increase. This is why researchers often study the effects of toxins on small, seemingly
insignificant species. Determining the deleterious effects of these toxins on lower level
organisms may alert humans to the ultimate danger of these substances.
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Sela, White, and Anfinsen's experiments on denatured ribonuclease showed that
a. protein denaturation is irreversible. b. proteins can renature to regain their activity only with the assistance of specialized enzymes. c. proteins can renature and regain their enzymatic activity. d. proteins can fold in a new structure that lacks enzyme activity.
Meiosis is the process by which ______ cells are produced from a cell that was originally diploid.
Fill in the blank(s) with the appropriate word(s).
Which of the following is the correct dental formula for an adult, unilaterally?
A. I2, C2, P3, M2 B. I2, C1, P3, M2 C. I2, C1, P2, M3 D. I2, C1, P2, M2 E. I2, C1, P2, M4
A diploid organism that is heterozygous for a given gene has the same number of alleles (not type of alleles) as does an organism that is homozygous for that gene.
a. true b. false