What is the partial pressure of oxygen in air at sea level?
A) 160 mm Hg
B) 210 mm Hg
C) 400 mm Hg
D) 60 mm Hg
E) 600 mm Hg
Ans: A) 160 mm Hg
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Fire can move, grow, reproduce, use energy, consume oxygen, and interact with its environment. Why is it not alive?
A. It does not consist of complex, well-ordered structures. B. It does not have cells. C. It does not pass on genes for traits to its offspring. D. All of the above are accurate reasons why fire is not alive.
Which of the following is not a function of root hairs? a. Increase the uptake of dissolved oxygen
b. Increase the uptake of carbon dioxide. c. Increase the uptake of mineral ions. d. Increase the uptake of soil water. e. Increase surface area of the root system.
Because it has no introns, researchers prefer to use
__________ when working with eukaryotic genes. a. cDNA b. single-stranded DNA c. hybridized DNA d. bacterial DNA e. viral DNA
Which statement about the interaction between genes and environment is most correct?
A. Phenotypic variation is derived from a single source. B. The phenotype, once determined, is invariable. C. The phenotype is produced by interaction of genotype and the environment. D. The phenotype can be quantified into genotypic and environmental components. E. None of these is true.