Pinpoint Pupils

question 23

Multiple Choice

Pinpoint pupils

• A)describe the size of the pupils in a darkened room.
• B)are caused by the contraction of the circular muscles of the iris.
• C)are caused by mydriatic drugs.
• D)are caused by the contraction of the radial muscles of the iris.

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Definitions:

Geographic Barrier

A physical or environmental feature that prevents the free movement of species, leading to genetic isolation and potentially speciation.

Allopatry

Occurs when populations are in separate, nonoverlapping geographic areas (that is, they are separated by geographic barriers to gene flow).

Horizontal Gene Transfer

The movement of genetic material between unicellular and/or multicellular organisms other than by the transmission of DNA from parent to offspring.

Bacteriophage Virus

A type of virus that infects and replicates within bacteria, using them as hosts to multiply.