The IUCN Has Defined Categories to Be Applied to Species

question 67

Multiple Choice

The IUCN has defined categories to be applied to species based on their conservation status. The category "extinct in the wild" refers to a species that

• A) was known to exist in the year 1500 but no individuals remain alive today.
• B) was known to exist in the year 1900 but no individuals remain alive today.
• C) can be found only in zoos or facilities that might be conducting captive breeding.
• D) are found only in less than 1 percent of their original documented native habitat

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Definitions:

Older People

Individuals who are in the later stage of life, typically those considered to be of retirement age or beyond.

Nondisjunction

The improper separation of chromosomes during the process of cell division, resulting in cells possessing atypical numbers of chromosomes.

Gamete

Ovum or spermatozoon.

Chromosomes

Structures found within cells that contain DNA and proteins, responsible for carrying genetic information.