When the Body Is Invaded by Antigens,the Immune System Forms

question 20

Multiple Choice

When the body is invaded by antigens,the immune system forms substances called

• A)antibodies.
• B)macrophages.
• C)lymphocytes.
• D)helper cells.

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Definitions:

Lava Flow

Molten rock that erupts onto the Earth's surface during a volcanic eruption, which cools and solidifies into igneous rock.

Dike Unit

A vertical or steeply inclined sheet of rock that is created when magma intrudes into a crack then solidifies.

Depositional

Relating to the process in which material is laid down or deposited by various means, including water, wind, or ice.

Cenozoic Basalts

Volcanic rocks that were formed during the Cenozoic era, known for their dark color and high iron and magnesium content.