Which is a healthy BMI
A. 38
B. 20
C. 16
D. 27
Answer: B. 20
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Based on DNA hybridization, humans and chimpanzees are the same species
Indicate whether this statement is true or false.
An example of a secondary acquired immunodeficiency is
A. adenosine deaminase (ADA) deficiency. B. SCID. C. agammaglobulinemia. D. DiGeorge syndrome. E. AIDS.
The mass extinction that occurred on earth 65 million years ago was immediately followed by:
a) the rise of archaea. b) the emergence of the first non-photosynthetic organisms. c) an increase in atmospheric oxygen levels. d) the rapid divergence and radiation of modern mammals. e) the rise of the reptiles, including the dinosaurs.
An enzyme that copies DNA to make a molecule of RNA is
A) RNA polymerase. B) DNA ligase. C) DNA helicase. D) transposase. E) DNA polymerase.