Which structure is the major site of antibody production and a disposal site for old red blood cells?
a. Thymus
b. Spleen
c. Lymph vessels
d. Tonsils
e. Bone marrow
b
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The sub-atomic particle with a positive charge is ________.
A. a proton B. a neutron C. an ion D. an isotope E. an electron
You are growing yams in a vegetable garden. When eating the yam, what modified plant tissue are you eating?
A. stem B. leaf C. root
Which of the following proteins-functions is mismatched?
A. DNA primase-production of RNA primer B. single-stranded binding proteins-prevents single DNA strands from reforming into a double helix C. DNA polymerase-primer removal and replacement with DNA D. DNA polymerase-DNA synthesis E. topoisomerase-separates double-stranded DNA into single strands
Which of the examples below are polymorphic traits? Select all that apply.
A. Lactose tolerance and intolerance in humans. B. A population of lilies that contains equal proportions of both blue and white flowering individuals. C. The A, B, and O blood types found in humans. D. Hair loss in malnourished, captive chimpanzees. E. The change from white coat in winter to brown coat in summer in Arctic fox populations.