The Colonization of Land by Plants Appears to Have Begun

question 53

Multiple Choice

The colonization of land by plants appears to have begun about

• A) 542 million years ago
• B) 360 million years ago
• C) 65 million years ago
• D) 475 million years ago

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Definitions:

Ulna

The ulna is one of the two long bones in the forearm, extending from the elbow to the smallest finger, and is located on the side opposite to the thumb.

Anterior Superior Iliac Spine

The anterior superior iliac spine (ASIS) is a bony projection on the iliac bone and serves as an important landmark in anatomy for muscle attachment and medical procedures.

Iliac Crest

The uppermost edge of the ilium, one of the three bones that make up the human pelvis, important for muscle attachment and as a landmark in medical procedures.

Iliac Fossa

A concave surface on the inner side of the ilium, part of the pelvic bone, which serves as the origin for several muscles.