Imagine That a Deep Temperate Zone Lake Did Not Turn

question 22

Multiple Choice

Imagine that a deep temperate zone lake did not turn over during the spring and fall seasons. Based on the physical and biological properties of limnetic ecosystems, what would be the difference from normal seasonal turnover?

• A) The lake would fail to freeze over in winter.
• B) An algal bloom of algae would result every spring.
• C) Lakes would suffer a nutrient depletion in surface layers.
• D) The pH of the lake would become increasingly alkaline.

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Definitions:

Pleural Cavity

The thin fluid-filled space between the two layers of the pleura surrounding each lung.

Air

The undetectable blend of gases encircling the Earth, predominantly made up of oxygen and nitrogen.

Pleural Effusion

The accumulation of excess fluid between the layers of the pleura, the membrane that lines the chest cavity and surrounds the lungs.

Pleural Cavity

The thin fluid-filled space between the two pleural membranes surrounding each lung, providing lubrication during breathing.