Which of the following is a property of water?
A. it has a high capacity for heat.
B. it is not a common reactant in metabolic reactions.
C. It is not a good solvent.
D. it is liquid in a very narrow temperature range.
E. it is a nonpolar molecule.
Answer: A
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In some genetically engineered tomatoes, fruit ripening was delayed by crippling the gene that produces which hormone?
A. auxin B. ethylene C. abscisic acid D. gibberellin E. cytokinin
Which statement about calico cats is false?
A. Calico cats are genetic mosaics. B. Calico cats can be male or female. C. The variation in coat color is an example of an epistatic interaction. D. The different colored fur is due to the inactivation of one X chromosome.
The onset of puberty is triggered by maturation of the brain, which stimulates the hypothalamus to secrete
A) testosterone. B) progesterone. C) gonadotropin-releasing hormone (GnRH). D) luteinizing hormone (LH). E) chorionic gonadotropin (CG).
Large ears is a rare trait in a mainland population of mice. A female mouse homozygous for very large ears sneaks onto a boat and arrives at an island that already contains mice. This mixing will lead to a population with a higher incidence of big ears than the mainland population because of
A. genetic drift. B. gene flow. C. natural selection. D. increased mutation. E. a bottleneck effect.