Advantages of bipedalism include
A. movement through the treetops and clinging to vines.
B. the ability to run faster.
C. freeing of hands to carry objects and ability to use tools.
D. increased brain size.
E. All answers are correct.
Answer: C. freeing of hands to carry objects and ability to use tools.
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Somatic hypermutation occurs only in the ________ regions of rearranged heavy and light chains
A) D B) HV C) J D) V
How do retroviruses differ from other RNA viruses?
a. Retroviruses have a unique capsid shape. b. Retroviruses lytically destroy their hosts.
c. Retroviruses have a unique infection technique of their host cells. d. Retroviruses have a capsid composed of protein and carbohydrates. e. Retroviruses have reverse transcriptase instead of RNA-dependent RNA polymerase
Trace the path of a red blood cell in a circuit that takes it from the capillary bed of the right kidney to the capillary bed of the left kidney. Assume that you are doing this for an animal with a double circulation system
A) capillary bed of right kidney ? venules ? veins ? right atrium ? right ventricle ? pulmonary arteries ? capillaries of lungs ? pulmonary veins ? left atrium ? left ventricle ? aorta ? arteries ? arterioles ? capillary bed of left kidney B) capillary bed of right kidney ? venules ? veins ? right atrium ? right ventricle ? pulmonary veins ? capillaries of lungs ? pulmonary arteries ? left atrium ? left ventricle ? aorta ? arteries ? arterioles ? capillary bed of left kidney C) capillary bed of right kidney ? venules ? veins ? left atrium ? left ventricle ? pulmonary arteries ? capillaries of lungs ? pulmonary veins ? right atrium ? right ventricle ? aorta ? arteries ? arterioles ? capillary bed of left kidney D) capillary bed of right kidney ? arterioles ? arteries ? aorta ? right atrium ? right ventricle ? pulmonary arteries ? capillaries of lungs ? pulmonary veins ? left atrium ? left ventricle ? veins ? venules ? capillary bed of left kidney
A chemical agent that kills pathogenic microbes in general is a(n)
A. sanitizer. B. germicide. C. disinfectant. D. fungicide. E. antiseptic.