What was the most significant conclusion of Griffith's experiments with pneumonia in mice?
A) S-strain bacteria can cause pneumonia.
B) There is a substance present in dead bacteria that can cause a heritable change in living bacteria.
C) Heat destroys the hereditary material.
D) The genetic material was definitively proven to be DNA.
E) Mice exposed to the S-strain bacterium became resistant to the R-strain bacterium.
B
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Four of the five answers listed below are characteristic of meiosis. Select the exception
a. involves two divisions b. reduces the number of chromosomes c. results in producing genetically identical cells d. produces haploid cells e. occurs in the gonads
Which of the following will not increase the rate of transpiration in a plant?
A. high humidity B. low humidity C. high wind speeds D. high temperature E. All answers are correct.
One species of fish feeds in the muddy bottom of a lake. A second species eats insects that land on the water surface. This is an example of
A) mechanical incompatibility. B) behavioral isolation. C) ecological isolation. D) geographic isolation. E) temporal isolation.
John Snow's research during a cholera outbreak in London laid the foundation for which of the following branches of microbiology?
A) infection control only B) epidemiology only C) immunology only D) both infection control and epidemiology E) infection control, epidemiology, and immunology