Which level of biodiversity represents the most common way to measure and estimate biodiversity?
A. genetic diversity
B. cultural diversity
C. species diversity
D. ecosystem diversity
E. population diversity
Answer: C. species diversity
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Which of the following statements regarding Campylobacter jejuni is incorrect?
A. It produces an enterotoxin that stimulates diarrhea. B. It infects the stomach. C. It is transmitted through ingestion of contaminated chicken, meat, milk, or water. D. It causes fever and a watery to bloody diarrhea. E. The cells are gram-negative, curved rods with darting motility.
Ricin is
a. a substance found in castor bean seeds. b. a polysaccharide extracted from rice. c. an ingredient in many paints and cosmetics. d. a protein that inactivates ribosomes. e. a substance found in castor bean seeds and a protein that inactivates ribosomes.
Although all of the cells in your body contain a complete set of DNA, different types of cells arise because__________.
a) different genes are switched on and off in each type of cell b) the contain different chromosomes c) they contain different genes d) none of the above
Which of the following statements comparing the naked mole rat social system with social insect societies are true? (Check all that apply.)
A. As with social insect societies, there is one queen and several reproductive males per colony. B. As with social insect societies, colony members are kin. C. As with social insect societies, it is based on haplodiploidy. D. As with social insect societies, there is a division of labor within the colony. E. Unlike social insect societies, all colony members are diploid.