Sperm

question 34

Multiple Choice

Sperm

• A) travel at random inside a woman's reproductive tract.
• B) find ovum as a matter of luck.
• C) are attracted to ova by the odor of a chemical they secrete.
• D) are attracted to ova by a sound wave they emit.

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Definitions:

Ancestral Organism

The original form from which a species or group of species evolved.

Macroevolution

Large-scale evolutionary changes that occur over geologic time, leading to the emergence of new species and broader taxonomic groups.

Microevolution

Change in the genetic makeup of a species or a small group of organisms over a brief time period, regarded as evolutionary.

Speciation

Evolution of a new species.