Which Statement Correctly Describes a Trout That Lives in Fresh

question 12

Multiple Choice

Which statement correctly describes a trout that lives in fresh water?

• A) The external environment is hypertonic with respect to the trout's cells, so the trout must protect itself from water moving into cells from the outside.
• B) The external environment is hypotonic with respect to the trout's cells, so the trout must protect itself from water moving out of its cells to the outside.
• C) The external environment is hypertonic with respect to the trout's cells, so the trout must protect itself from water moving out of its cells to the outside.
• D) The external environment is hypotonic with respect to the trout's cells, so the trout must protect itself from water moving into cells from the outside.
• E) The external environment is isotonic with respect to the trout's cells, so the trout must protect itself from water moving back and forth between its cells and the environment.

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Definitions:

Purine

A nitrogen-containing compound that is one of the two types of bases found in DNA and RNA, the other being pyrimidine.

Pyrimidine

A nitrogenous base found in nucleic acids, characterized by a single ring structure, such as cytosine, thymine (in DNA), and uracil (in RNA).

Diploid

Having two of each type of chromosome characteristic of the species (2n).

Chromosomes

Structures consisting of DNA and proteins, found in the nucleus of cells, carrying genetic information in the form of genes.