Many of the Organisms Responsible for Toxic Red Tides and Paralytic

question 20

Multiple Choice

Many of the organisms responsible for toxic red tides and paralytic shellfish poisoning belong to the Division:

• A)Bacillariophyta.
• B)Chlorophyta.
• C)Phaeophyta.
• D)Pyrrophyta.
• E)Rhodophyta.

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Definitions:

Fossil Record

The accumulation of evidence from preserved remains or impressions of organisms from past geologic ages.

Background Extinctions

The normal rate of extinction for species or a certain baseline level of extinctions that occurs without human intervention or major catastrophes.

Genetic Mutations

Changes in the DNA sequence of an organism's genome, which can result in variations in physical appearance, function, or behavior.

Artificial Selection

The human practice of breeding plants or animals for desired traits.