Simple quiz

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Kysymys:

True/false question

Carbon becomes locked as part of the accumulating plant biomass as plants grow.

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Kysymys:

True/false question

Almost half of the total biomass of a tree may be allocated to the roots.

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Kysymys:

True/false question

At low air humidity, a plant closes its stomata to prevent transpiration. The action also decreases photosynthesis

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Kysymys:

Multiple choice question

Photosynthesis of a tree canopy is driven or influenced by

photosynthetically active solar radiation (PAR).

soil moisture (REW).

air temperature (T).

atmospheric CO2.

the total leaf area (LAI).

air humidity (VPD).

Vastaus:

air temperature (T).

soil moisture (REW).

photosynthetically active solar radiation (PAR).

atmospheric CO2.

the total leaf area (LAI).

air humidity (VPD).

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Kysymys:

True/false question

Transpiration decreases as air becomes drier.

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Kysymys:

True/false question

High soil moisture leads to decreased photosynthesis.

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Vastaus:

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In boreal upland forests, low soil moisture decreases the rate of photosynthesis.

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Kysymys:

Multiple choice question

The annual cycle of photosynthesis mainly follows

the changes in light.

the changes in air temperature.

the changes in CO2 concentration.

the changes in soil temperature.

Vastaus:

the changes in soil temperature.

the changes in light.

the changes in air temperature.

the changes in CO2 concentration.

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Kysymys:

True/false question

Carbon capture is performed by the green parts of plants via photosynthesis.

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Kysymys:

Multiple choice question

Photoinhibition means the decrease in photosynthesis due to

exposure to excess of light.

exposure to excess of CO2.

exposure to shortage of soil moisture.

exposure to high temperature.

Vastaus:

exposure to high temperature.

exposure to excess of CO2.

exposure to excess of light.

exposure to shortage of soil moisture.

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Kysymys:

True/false question

The effect of light on photosynthesis has a clear saturating pattern: more light results in more photosynthesis but eventually leaves cannot take full advantage of all the extra light.

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Kysymys:

Multiple choice question

To transform atmospheric CO2 into organic molecules, plants can use the energy from

atmospheric oxygen.

soil heat.

soil nutrients.

sun light.

Vastaus:

sun light.

atmospheric oxygen.

soil heat.

soil nutrients.

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Kysymys:

True/false question

Leaf area increases with stand age, resulting in a decreasing rate of photosynthesis in the stand.

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An increment in leaf area increases also the photosynthesis of a tree stand. However, the relationship is saturating.

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Kysymys:

Multiple choice question

What is the source of carbon that is assimilated in photosynthesis?

Soil nutrients

Atmospheric CO2

Soil water

Solar radiation

Vastaus:

Soil nutrients

Soil water

Solar radiation

Atmospheric CO2

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Kysymys:

Multiple choice question

As plants respire, they release

carbon dioxide.

oxygen.

Vastaus:

oxygen.

Palaute:

Photosynthesis releases oxygen whereas respiration releases CO2.

carbon dioxide.

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Kysymys:

True/false question

A complex microbiota lives belowground, releasing carbon dioxide to the soil.

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