Found mostly in freshwater, members of this Lophotrochozoan phylum have a wheel-like, ciliated
food-gathering organ around their head called a corona. Some members of this phylum make extensive
use of parthenogenesis for reproduction.
a. Rotifera
b. Mollusca
c. Platyhelminthes
d. Annelida
e. Nemertea
A
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Lipids with polar and nonpolar ends are said to be
A. bilateral. B. amphipathic. C. amphibolic. D. None of the choices are correct.
The gastrointestinal tract does not include the ____.
A. stomach B. mouth C. larynx D. esophagus E. small intestine
A scientist is trying to coax stem cells to differentiate into muscle to use as a therapy for muscular dystrophy. He looks at his Petri dish and is excited to see the cells contracting! The cells appear striated and multinucleate. What type of muscle are they?
A. Skeletal muscle B. Cardiac muscle C. Smooth muscle D. Involuntary muscle
If you were to study all of the insect-eating birds in a forest, you would see that many birds eat insects,
yet you may not see any evidence of competition. What is the most probable explanation? a. The birds have coevolved. b. The birds are exhibiting resource partitioning. c. The birds are exhibiting intraspecific competition only. d. There is no keystone species in this community. e. There is not enough species richness to see evidence of competition.