When a mosquito bites a person and infects the person with malaria, the mosquito is serving as a(n) ___________
A. Airborne
B. Vehicle-borne
C. Direct
D. Vector
Answer: D. Vector
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The half-life of Carbon-14 is approximately 5,700 years. Using this information scientists have been able to determine the age of some artifacts left by humans. A scientist wants to know approximately how old a piece of wood was that she found on the floor in an old cave that had recently been discovered. She removed the wood (with permission) to her laboratory. Her wood sample contained 2 grams
of Carbon-14 . If the age of the wood was determined to be 22,800 years old, how much Carbon-14 originally existed in this piece of wood? A. 32 grams B. 16 grams C. 12 grams D. 8 grams E. 4 grams
Familial Down syndrome is a result of
A. inversion. B. deficiency. C. gene duplication. D. translocation
An example of homoplastic structures is the wing of a butterfly and:a
wing of a moth. b. wing of a bird. c. antenna of a moth. d. legs of the butterfly. e. antenna of the butterfly.
________ reactions are inappropriate responses against a threat that lead to immune-based pathologies such as allergy and autoimmunity
A) Autopathic B) Aversion C) Endopathic D) Sensitivity E) Hypersensitivity