John Snow's Research During a Cholera Outbreak in London Laid

question 53

Multiple Choice

John Snow's research during a cholera outbreak in London laid the foundation for which of the following branches of microbiology?

• A) epidemiology
• B) infection control
• C) immunology
• D) Both A and B are correct.
• E) A, B, and C are correct.

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Definitions:

Self-incompatibility

A mechanism in some plants that prevents self-fertilization and promotes genetic diversity by rejecting pollen from the same or genetically similar plant.

Pollen Tube

A tube that forms from a pollen grain and grows toward the ovule to enable sperm to pass directly to an egg for fertilization in plants.

Diploid

An organism or cell that contains two complete sets of chromosomes, one from each parent.

Sporophyte Generation

One of the two alternating phases in the life cycles of plants and algae, characterized by a multicellular diploid phase that produces spores.