Timescales of Events Are

question 8

Multiple Choice

Timescales of events are:

• A)fluid and likely to change.
• B)fixed with specific timeframes of activity.
• C)difficult to determine as all events are unique.
• D)usually very short-termed in nature.

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Definitions:

Ovum

A female gamete or egg cell that, when fertilized by a sperm, begins the process of developing into a new organism.

Sperm

Male reproductive cells or gametes in sexually reproducing organisms that combine with the female gamete, leading to fertilization and the development of a new organism.

Teratogen

Any factor that can cause a birth defect.

Birth Defect

A physical or biochemical abnormality that is present at birth and that may cause physical or mental disability.