Instructions: Choose One Answer from Each Pair of Selections

question 31

Short Answer

Instructions: Choose one answer from each pair of selections. In the single-cell model of the earth's general circulation of air, a large thermally driven convection cell is located in each hemisphere. Surface air flows EQUATORWARD | POLEWARD.

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Definitions:

Calvin Cycle

A series of biochemical reactions taking place in the chloroplasts of photosynthetic organisms, part of the process of carbon fixation in photosynthesis.

Rubisco

The common name of ribulose bisphosphate carboxylase/oxygenase, the enzyme that catalyzes the fixation of carbon dioxide in the Calvin cycle.

PGA

The term PGA could refer to multiple concepts depending on context; if related to biology, it often stands for Phosphoglyceric acid, a 3-carbon molecule formed in the Calvin cycle of photosynthesis.

Light Compensation Point

The light intensity level at which the rate of photosynthesis equals the rate of respiration, leading to no net gain of energy by the plant.