The natural loss of dead cells from the surface of your skin is a result of:
A. loss of adherens junctions between
epithelial cells.
B. breakdown of desomsomes.
C. loss of microvilli.
D. Answers a and b are both correct.
D
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Like the insects, the arachnids (spiders and so on) have
a. three pairs of walking legs. b. one pair of antennae. c. true mandibles. d. an abdomen.
According to the multiregional model,
a. Homo erectus populations migrated out of Africa. b. Homo erectus evolved further in regions beyond Africa. c. Homo erectus populations gave rise to races of Homo sapiens. d. Homo sapiens subpopulations originated in several separate locations. e. all of these are true.
Which of the following protozoans is mismatched with the disease that it causes?
A. Trypanosoma brucei-sleeping sickness B. Trichomonas vaginalis-vaginitis and urethritis C. Giardia lamblia-malaria D. Entamoeba histolytica-amoebic dysentery
________ is a type of chronic obstructive pulmonary disorder, or COPD.
a. Pneumonia b. Apnea c. Bronchitis d. Lung cancer e. Emphysema