Noticing Large Amounts of Algal Growth in Her Small Farm

question 44

Multiple Choice

Noticing large amounts of algal growth in her small farm pond,a farmer adds about 20 grass carp to feed on the abundant algae and plants.After several years,the carp grow large,exceeding 20 pounds each in size.Late one summer,the farmer notices that the carp and most of the other fish are dead.The water also smells very bad.Which one of the following is the most likely explanation for the death of these fish?

• A)the algae overgrew the pond and produced toxic levels of ozone
• B)the large carp grew so large that they could not get enough oxygen
• C)bacteria feeding on the large volume of carp feces depleted the oxygen
• D)carbon dioxide released by the carp and algae eventually suffocated the fish in the pond

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Definitions:

Jaundice

A medical condition characterized by yellowing of the skin and eyes due to high bilirubin levels.

Protein Digestion

The process of breaking down proteins into their constituent amino acids or peptides, which can then be absorbed by the body, primarily occurring in the stomach and small intestine.

Bacteria

Single-celled microorganisms that exist in various environments, some beneficial to humans and others pathogenic.

Vitamins

Organic compounds required in small amounts for normal metabolism and not synthesized in sufficient quantities by the body.