Organisms with true radial symmetry
A) have their sense organs, mouth, and brain clustered in the head.
B) tend to be highly mobile.
C) do not have a distinct head region and tend to be sedentary or passive drifters.
D) can be divided into two matching halves along only one plane.
Answer: C
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American alligators are living members of this lineage
a. Testudines b. Archosauromorpha c. Squamata d. Sphenodontia e. Amphibia
Which of the following is an example of an
event that would set up the scene for primary succession?
a. a dense landslide of mountain rocks covering an entire valley b. a fire that burns off all of the surface vegetation c. an agricultural field that is abandoned d. a lake that dries up killing all of the aquatic plants e. all of these set the scene for secondary succession NOT primary succession
GPP, or Gross Primary Productivity:a
is the energy that remains in a plant after photosynthesis b. is the total energy captured from the sun through photosynthesis c. is the rate at which excess plant energy is converted to tissue for growth d. is the amount of energy available for primary consumers e. represents approximately 80% of the energy captured from the sun
Peptide hormones
A. are able to pass through the membrane and bind to a receptor in the cytoplasm. B. initiate gene expression. C. act much more slowly than steroid hormones. D. bind to a receptor in the plasma membrane. E. are composed of a complex of four carbon rings.