In a lichen, the mycobiont receives
a. nutrients.
b. protection from herbivory.
c. aid in sexual reproduction.
d. enhanced dispersal of offspring.
e. shelter from radiation and desiccation.
A
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If you ran the same experiment as Engelmann without passing light through a prism, what would you predict?
A) The results would be the same. B) The bacteria would be relatively evenly distributed along the algal filaments. C) The number of bacteria present would decrease due to an increase in the carbon dioxide concentration. D) The number of bacteria present would increase due to an increase in the carbon dioxide concentration. E) The number of bacteria would decrease due to a decrease in the temperature of the water.
Downward bending of a seedling root can be
blocked by a. moving it to a dark room. b. auxin transporters. c. auxin transport inhibitors. d. mutations in genes that code for auxin transport proteins. e. auxin transport inhibition and mutations in genes that code for auxin transport proteins.
The central nervous system develops from the same area from which this is derived
A) skin B) blood cells C) digestive system D) muscles
Which of the following statements about the benefits of sexual reproduction is false?
(a) Sexual reproduction permits enhanced survival because the gametes that carry alleles enhancing survival in harsh environments are used preferentially during fertilization. (b) Unicellular organisms that can undergo sexual reproduction have an increased ability to adapt to harsh environments. (c) Sexual reproduction reshuffles genes, which is thought to help species survive in novel or varying environments. (d) Sexual reproduction can speed the elimination of deleterious alleles.