Ice Ages

question 23

Multiple Choice

Ice ages

• A) have occurred only a few times in the past.
• B) have occurred often in the past.
• C) are unlikely to occur again.
• D) cover the entire earth with sheets of ice.

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Definitions:

Epiphyseal Plate

Also known as the growth plate, it is a hyaline cartilage plate in the metaphysis at the ends of long bones, where bone growth occurs.

Lacunae

Small cavities in bone or cartilage tissue that house cells.

Spongy Bone

Also known as cancellous or trabecular bone; a less dense, more porous form of bone found at the ends of long bones and in the vertebrae.

Trabeculae

A network of bony fibers in spongy bone that adds strength and supports the marrow.