Species richness increases _____
A) as we increase in altitude in equatorial mountains
B) as we travel southward from the North Pole
C) on islands as distance from the mainland increases
D) as depth increases in aquatic communities
E) as community size decreases
Answer: B
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A typical Euglena cell is elongated and bounded by a ________
A. pellicle. B. cytoproct. C. protuberance. D. plasmalemma.
The three-dimensional shape of a protein is determined by the ____ and the results of chemical modifications and
other processing events. a. interaction of R groups b. interaction with other polypeptide chains c. amino acid sequence d. bonds formed with other proteins e. initiation complex
Which statement about deserts and the organisms that live there is true?
A) Air temperatures in cold deserts, such as those west of the Rocky Mountains, may never fall below 30°C. B) Growth and reproduction occur year-round in deserts. C) Desert plants typically produce very few seeds. D) Many desert animals are nocturnal.
People who have type O blood have both an A antigen and a B antigen.
a. true b. false