Lamarck's theory of evolution was based upon 

A. polyploidy.
B. geographic isolation.
C. macroevolution.
D. acquired characteristics.


D. acquired characteristics.

Biology & Microbiology

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The ratio of toxic dose to therapeutic dose is called the

A. therapeutic index. B. phenol coefficient. C. susceptibility quotient. D. toxicity index.

Biology & Microbiology

The structure of the ribosome is uniform throughout a eukaryotic cell

Indicate whether the statement is true or false

Biology & Microbiology

What phenomena tends to increase genetic variation in a population?

A. Gene flow B. Population bottleneck C. Assortative mating D. Genetic drift E. Founder effect

Biology & Microbiology

A section of lung from a patient with sputum cultures positive for acid-fast organisms is negative when stained with the Ziehl-Neelsen stain. To confirm that no organisms are present in the lung tissue, it would be best to stain new sections with:

a) auramine-rhodamine b) Giemsa c) Gram d) Dieterle

Biology & Microbiology