Which of the following statements describes an
electron transfer chain?
a. It generates energy from carbohydrates.
b. Cells use it to dispose of excess electrons.
c. It utilizes ATP to synthesize nutrients.
d. It transfers energy, stepwise, from one
compound to another.
e. It requires activation by oxygen.
Answer: d
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One disadvantage of a simulation model of an ecosystem is that it ____
a. does not take into effect interactions between organisms b. does not take into effect nutrient availability c. does not take into effect water availability d. may not be accurate e. may predict disastrous consequences
Within the Hardy-Weinberg formula p represents ________
a. the frequency of the dominant allele b. the frequency of the dominant allele plus the recessive allele c. the recessive genotype frequency d. the dominant genotype frequency e. the frequency of the recessive allele
As you and a friend are entering a chemistry laboratory at your university, you see a sign that states: DANGER-RADIOACTIVE ISOTOPES IN USE. Your friend is an accounting major and has not had any science courses yet. She asks you what a radioactive isotope is and you respond correctly with:
A. Radioactive isotopes are atoms that are unstable and as a result emit energy in a process called radioactive decay. B. Radioactive isotopes are atoms that are stable and as a result only emit energy if they are exposed to higher temperatures. C. Radioactive isotopes are atoms that are stable and as a result emit energy in a process called radioactive decay. D. Radioactive isotopes are atoms that are unstable but unless actively disturbed by some chemical process will remain intact and pose no problems.
When placed in the same habitat, Paramecium aurelia will replace Paramecium caudatum. This is an example of:
A) competitive exclusion. B) commensalism. C) mutualism. D) parasitism.