Hooker’s evening primrose keeps its flowers closed until the early evening when they open. This is an example of
____.
a. phototropism
b. vernalization
c. a circadian rhythm
d. photoperiodism
e. apical dominance
ANSWER: c
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Which of the following is not a property of water that results from hydrogen bonding?
A) The temperature of water changes very slowly. B) Many polar substances dissolve in water. C) Water molecules have cohesiveness. D) Ice melts at -100°C. E) Water has a high surface tension.
Which cell does NOT belong with the others?
a. erythrocytes b. neutrophils c. lymphocytes d. eosinophils e. macrophages
Which of the following is a protozoan with two nuclei and no mitochondria?
A) Plasmodium B) Paramecium C) Euglena D) Giardia E) Trichomonas
Put the steps of creating a DNA fingerprint in the correct chronological order.
A) Amplify each STR region, sort the fragments by size, and determine the size of the fragments. B) Sort the fragments by size, use PCR to amplify the fragments, and determine the genotype of each fragment. C) Determine the genotype of each STR allele, amplify the STR region, and sort the alleles by size. D) Use PCR to amplify each STR region, determine the size of each fragment, and sort the fragments by size. E) Determine the genotype of each STR allele, sort each allele by size, and amplify the STR region.