The Immune System Is Weakened in AIDS Patients Because the Human

question 32

Multiple Choice

The immune system is weakened in AIDS patients because the human immunodeficiency virus directly attacks the lymphocytes called

• A)killer T cells.
• B)T4 (helper) cells.
• C)suppressor T cells.
• D)B cells.

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Definitions:

Extinction

The permanent loss of all members of a species, leading to its disappearance from the Earth.

Reconciliation Ecology

The science of inventing, establishing, and maintaining new habitats to conserve species diversity in places where people live, work, or play.

Bluebirds

Small North American songbirds known for their distinctive blue (or blue and red) plumage, belonging to the genus Sialia.

Wetlands

Areas of land where saturation with water is the dominant factor determining the nature of soil development and the types of plant and animal communities living in the soil and on its surface.