Trypanosoma brucei is transmitted by

a) tsetse flies.
b) body lice.
c) houseflies.
d) head lice.


Ans: a) tsetse flies.

Biology & Microbiology

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14 homologous genes encoding globins (hemoglobin, myoglobin) in the human genome were originally derived from a single ancestor that duplicated 500-600 million years ago. Which term most adequately describes the relationship between these genes?

A. sister chromatids B. gene family C. gene cluster D. moderately repetitive sequences E. highly repetitive sequences

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Which of the following statements explains why scientific theories, like the theory of evolution, hold more weight than an everyday theory?

a. Scientific theories are made my scientists that can be trusted more than other people. b. Scientific theories are based on scientific evidence, while an everyday theory is a guess. c. Scientific theories and everyday theories are the same. d. Scientific theories do not hold the same weight as an everyday theory.

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Plant cells release hydrogen ions and oxygen from

H2O molecules in a. photosystem I. b. photosystem II. c. cyclic photophosphorylation. d. light independent reaction. e. carbon fixation.

Biology & Microbiology

Red tide is the result of an elaborate "bloom" of protozoans.

a. true b. false

Biology & Microbiology