Simple quiz

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Kysymys:

Multiple choice question

As plants respire, they release

oxygen.

carbon dioxide.

Vastaus:

carbon dioxide.

oxygen.

Palaute:

Photosynthesis releases oxygen whereas respiration releases CO2.

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Kysymys:

True/false question

Plant respiration captures CO2.

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Unlike photosynhesis, plant respiration captures atmospheric oxygen and releases carbon dioxide.

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Kysymys:

Multiple choice question

Photoinhibition means the decrease in photosynthesis due to

exposure to excess of CO2.

exposure to shortage of soil moisture.

exposure to high temperature.

exposure to excess of light.

Vastaus:

exposure to shortage of soil moisture.

exposure to high temperature.

exposure to excess of light.

exposure to excess of CO2.

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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:

True/false question

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

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Kysymys:

Multiple choice question

Photosynthesis of a tree canopy is driven or influenced by

soil moisture (REW).

photosynthetically active solar radiation (PAR).

the total leaf area (LAI).

air temperature (T).

air humidity (VPD).

atmospheric CO2.

Vastaus:

soil moisture (REW).

atmospheric CO2.

photosynthetically active solar radiation (PAR).

the total leaf area (LAI).

air humidity (VPD).

air temperature (T).

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Kysymys:

True/false question

When there is low soil moisture, plants close its stomata pores which then decreases photosynthesis.

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Kysymys:

True/false question

Transpiration decreases as air becomes drier.

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Kysymys:

True/false question

The rate of respiration decreases with temperature.

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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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Vastaus:

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Väärin

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

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Kysymys:

True/false question

High soil moisture leads to decreased photosynthesis.

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Vastaus:

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Väärin

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

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Kysymys:

True/false question

In some part of the stems, some photosynthesis may also occur.

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Kysymys:

Multiple choice question

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

Solar radiation

Soil nutrients

Atmospheric CO2

Soil water

Vastaus:

Atmospheric CO2

Soil nutrients

Solar radiation

Soil water

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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:

True/false question

In general, the more carbon dioxide that is available to the plant, the faster the rate of photosynthesis - if other factors are favourable.

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