How Do Sieve Tube Member (Stm)cells Differ from Tracheids

question 2

Multiple Choice

How do sieve tube member (stm) cells differ from tracheids?

• A)stm cells occur in angiosperms;tracheids only occur in gymnosperms
• B)stm cells function as living cells;tracheids function as dead cells
• C)stm cells lack a companion cell;tracheids have a companion cell
• D)stm cells have secondary cell walls;tracheids have only a primary cell wall

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Definitions:

Photorespiration

The process that reduces the efficiency of photosynthesis in C3 plants during hot spells in summer; consumes oxygen and produces carbon dioxide through the degradation of Calvin cycle intermediates.

Rubisco

An enzyme that catalyzes the first step of carbon fixation in the process of photosynthesis.

Calvin Cycle

A biochemical process in plants, algae, and cyanobacteria which converts carbon dioxide and water into organic compounds, especially sugars, using ATP and NADPH produced in photosynthesis.

Glucose

An elementary sugar that is critical for energy production in living things and is included in a wide range of carbohydrates.