Refer to the Figure Showing the Excretory Systems of Flatworms

question 139

Multiple Choice

Refer to the figure showing the excretory systems of flatworms. Based on the figure, which statement is false?

• A) Secretion occurs at point 1.
• B) The fluid at point 2 is less concentrated than the extracellular fluid.
• C) At point 3, solutes are actively transported into the protonephridium.
• D) Structures at point 5 help move the fluid through the excretory system.
• E) The processes occurring at point 1 in flatworms occur in the metanephridium of earthworms.

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Definitions:

Observed Frequency

The number of times a particular value or category of data occurs in a set of data, used in the analysis of categorical variables.

Expected Frequency

The theoretically calculated frequency of an event or outcome based on the probabilities in a statistical experiment, often compared to observed frequencies in chi-squared tests.

Test Statistic

A statistic calculated from sample data, used to determine whether to reject the null hypothesis.

Coin

A flat, typically round piece of metal with an official stamp, used as money.