Which cells are found in lymph nodes to clear away bacteria and other unwanted substances?
a. T cells
b. B cells
c. dendritic cells
d. macrophages
e. platelets
ANSWER: d
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If a diploid cell goes through mitosis it will generate
A. four haploid cells. B. two diploid cells. C. two haploid cells. D. four diploid cells. E. This is not possible.
The semilunar valves are located in the
A. left atrium. B. major veins that enter the heart. C. pulmonary artery and aorta. D. right atrium.
In flowering plants, the mature male gametophyte is produced
A. within the ovule just prior to fertilization. B. in the anther. C. within the pollen granule during transfer. D. when the pollen makes contact with the stigma. E. in the pollen tube when the generative cell divides.
Which of the following statements would indicate a pedigree that shows the inheritance pattern of a recessive X-linked disease?
a. Most affected individuals are females. b. Most affected individuals are males. c. Males and females are affected equally. d. The disease is seen in every generation.