In all plants, the zygote and earliest stages of the developing embryo are
A) enclosed within a seed.
B) enclosed within a pollen grain.
C) attached to and nourished by the parent plant.
D) able to disperse in a tough-walled spore.
Answer: C
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Whisk ferns, club mosses, and horsetails have all the following characteristics in common with ferns except
A. all of these plants are seedless tracheophyte plants. B. all of these plants produce flagellated sperm. C. all of these plants form antheridia and archegonia. D. all of these plants require free water for the process of fertilization to occur. E. all of these plants have no vascular tissue.
What features are typical of plants that are good at performing phytoremediation? a. Grow large b. All of these choices
c. Able to uptake large amounts of contaminants d. None of these choices. e. Grow rapidly
Which of the following is NOT part of the CNS?
a. Schwann cells b. ganglia c. cranial nerves d. brain e. spinal nerves
Which model organism best represents the human genome?
a. Caenorhabditis elegans b. Escherichia coli c. Homo sapiens d. Drosophila melanogaster