Phosphorus, Which Is Often a Limiting Nutrient in Ecosystems, Is

question 22

Multiple Choice

Phosphorus, which is often a limiting nutrient in ecosystems, is important because it

• A) evaporates quickly.
• B) is found only in sedimentary rocks.
• C) is necessary for the production of cellulose so that autotrophs can grow and provide food for heterotrophs.
• D) is part of the hydrologic cycle.
• E) is needed for molecules such as adenosine triphosphate (ATP), cell membranes, and nucleic acids.

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Definitions:

Squared Deviations

The squared differences between each data point in a set and the set's mean, used in statistical analysis to measure variance.

Air-over-hydraulic Brakes

A braking system that uses air pressure to control the hydraulic fluid movement, thereby combining the advantages of both air and hydraulic braking systems.

Hydraulic Booster Assemblies

Components designed to enhance the efficiency of hydraulic systems by increasing the pressure or force applied within the system.

Quick Release Valves

Quick Release Valves are components in air braking systems that allow for rapid exhaust of air from the brake chambers, facilitating faster release of the brakes and reducing brake release time.