What Was an Early Selective Advantage of a Coelom in Animals

question 20

Multiple Choice

What was an early selective advantage of a coelom in animals? A coelom ________.

• A) contributed to a hydrostatic skeleton, allowing greater range of motion
• B) was a more efficient digestive system
• C) allowed cephalisation and the formation of a cerebral ganglion
• D) allowed asexual and sexual reproduction

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Definitions:

Sporophyte

The diploid multicellular stage in the life cycle of plants and algae, which produces spores through meiosis.

Mitosis

The stage of cellular reproduction in which nuclear division occurs; process in which a parent nucleus produces two daughter nuclei, each having the same number and kinds of chromosomes as the parent nucleus.

Psilotum

A genus of fern-like plants belonging to the whisk fern family (Psilotaceae), known for lacking true roots and leaves.

Angiosperms

A large group of flowering plants that develop seeds within an enclosed ovary.