Homeotic Genes

question 23

Multiple Choice

Homeotic genes

• A)code for homeodomains.
• B)code for regulatory proteins.
• C)are a class of master genes.
• D)affect transcription.
• E)are all of these.

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Definitions:

Profundal Zone

A deep zone in a body of water, such as a lake, where sunlight does not penetrate, affecting the types of organisms that can live there.

Limnetic Zone

The open surface waters in a lake, away from the shore, where sunlight penetrates, supporting planktonic and free-swimming aquatic life.

Lakes

Inland bodies of standing freshwater or, in some cases, saline water, usually larger than ponds and contained by land.

Eutrophic

A condition of water bodies, such as lakes and rivers, characterized by an abundant accumulation of nutrients that promote a proliferation of algae.