Which One of the Following Statements About Transport of Nutrients

question 59

Multiple Choice

Which one of the following statements about transport of nutrients in phloem is false?

• A) Solute particles can be actively transported into phloem at the source.
• B) Companion cells control the rate and direction of movement of phloem sap.
• C) Differences in osmotic concentration at the source and sink cause a hydrostatic pressure gradient to be formed.
• D) A sink is that part of the plant where a particular solute is consumed or stored.
• E) A sink may be located anywhere in the plant.

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Definitions:

Sporadic Napping

The act of taking short, unplanned periods of sleep at irregular intervals.

Pseudocoma

A condition in which an individual appears to be in a coma but is actually aware and conscious.

RAS

Acronym for the Reticular Activating System, a network of neurons located in the brainstem that regulates wakefulness and sleep-wake transitions.

Sleep-Wake Cycle

The circadian rhythm that regulates periods of sleepiness and wakefulness throughout a 24-hour period.