Pheromones are ____ signals
a. tactile
b. electrical
c. acoustical
d. visual
e. chemical
ANSWER: e
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A gametophyte is a __________ plant body that
grows by __________ from a __________. a. haploid; mitosis; spore b. diploid; mitosis; spore c. diploid; mitosis; zygote d. diploid; meiosis; fertilized egg e. haploid; mitosis; fertilized egg
Which of the following statements about the regulation of gene expression in bacteria is false?
a. Genes can be turned on and off as environmental conditions change. b. Constitutive genes producing enzymes that are more stable are transcribed at a slower rate. c. Most gene regulation in bacteria occurs at the level of translation. d. Constitutive genes encoding proteins required in large amounts are transcribed more rapidly than genes for proteins required in smaller amounts. e. Constitutive genes with "strong" promoters bind RNA polymerase more frequently than genes with "weak" promoters
Examples of "new" features, which include wings on insects, flowers on plants, and feathers on birds,
are referred to as: a. preadaptations. b. allometric growth. c. allopolyploidy. d. paedomorphosis. e. punctuated equilibrium.
What are the three stages of translation and what occurs at each stage?
What will be an ideal response?