?
Figure 33.8
Use the accompanying figure to answer the following question.
What letter indicates a taste bud?
A. A
B. B
C. C
D. A and B
E. None of these, because they are olfactory receptors
Answer: A
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Which of the following statements about oxygen is false?
A. Oxygen is the only potential electron acceptor available on Earth's surface. B. Only the oxidation of organic molecules by O2 provides sufficient energy to support large, active organisms. C. Oxygen concentrations in the atmosphere favor diffusion into the interior cells of organisms. D. Oxygen is necessary for complex multicellular life. E. Oxygen became abundant in the atmosphere 580-560 million years ago.
Suppose you discovered a new mutation in mice that causes a curved spine. You noticed that this mutant phenotype is present only in females. When curved-spine females are crossed with normal males, the progeny are always recovered in a 1:1:1 ratio of curved-spine females, normal females, and normal males. Explain the genetic basis for this ratio.
A) hemizygous or homozygous lethal autosomal allele B) hemizygous or homozygous lethal sex-linked allele C) recessive sex-linked allele D) recessive autosomal allele E) dominant sex-linked allele
A biological safety cabinet filters out more microorganisms than an N95 mask.
Answer the following statement true (T) or false (F)
You propose an experiment where root hairs of a particular plant species are continuously treated with an antibiotic while nutrient levels in the plant tissue are monitored. Based on your knowledge of root hairs, you hypothesize the plant will experience a deficiency in what nutrient?
A. phosphorus B. calcium C. carbon D. nitrogen E. potassium