Sponges avoid predators by:
a. seeking sheltered locations.
b. having spicules.
c. producing toxins.
d. both b and c
e. a and b only.
D
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Which of the following is true in the angiosperm life cycle?
a. Gametophytes originate within and are dependent upon sporophytes. b. Sporophytes originate within and are dependent upon gametophytes. c. Both gametophytes and sporophytes are totally independent from each other and are equally dominant. d. Gametophytes are free-living and photosynthetic, but are replaced by a dominant sporophyte generation. e. Gametophytes are photosynthetic and partially independent from the sporophytes.
Many mammals have skins and mucous membranes that are sensitive to phenolic secretions of plants like poison oak (Rhus). These secondary compounds are primarily adaptations that _____
A) favor pollination B) foster seed dispersal C) decrease competition D) inhibit herbivory
What is the job of tRNA during translation?
A. It carries amino acids to the mRNA. B. It triggers the formation of a covalent bond between amino acids. C. It binds to the small ribosomal subunit. D. It triggers the termination of the protein.
Prokaryotic cells divide by a process known as
A. conjugation. B. mitosis. C. binary fusion. D. binary fission.