When a Red Tide Occurs, Huge Numbers of Microscopic Organisms

question 73

Multiple Choice

When a red tide occurs, huge numbers of microscopic organisms are filtered out of coastal waters by oysters and clams. This sometimes causes the shellfish to become toxic to people who eat them. The organisms that create the red tide are classified as:

• A)slime molds.
• B)diatoms.
• C)dinoflagellates.
• D)red algae.
• E)euglenids.

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