Simple quiz

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Tulos 1 / 1

Kysymys:

Multiple choice question

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

Solar radiation

Atmospheric CO2

Soil water

Soil nutrients

Vastaus:

Atmospheric CO2

Soil water

Soil nutrients

Solar radiation

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Kysymys:

True/false question

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

Answer hidden

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Kysymys:

Multiple choice question

Photosynthesis of a tree canopy is driven or influenced by

air humidity (VPD).

soil moisture (REW).

air temperature (T).

atmospheric CO2.

photosynthetically active solar radiation (PAR).

the total leaf area (LAI).

Vastaus:

photosynthetically active solar radiation (PAR).

soil moisture (REW).

atmospheric CO2.

air temperature (T).

air humidity (VPD).

the total leaf area (LAI).

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Kysymys:

True/false question

High soil moisture leads to decreased photosynthesis.

Answer hidden

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

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

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

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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

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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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

Transpiration decreases as air becomes drier.

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Vastaus:

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Kysymys:

True/false question

Plants open its stomata to avoid losing too much water.

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Vastaus:

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Plant closes its stomata to avoid losing too much water.

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Kysymys:

True/false question

Early spring is a tricky time for plants due to the combination of sunny but still quite cold days.

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Vastaus:

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Kysymys:

Multiple choice question

Photoinhibition means the decrease in photosynthesis due to

exposure to shortage of soil moisture.

exposure to excess of CO2.

exposure to high temperature.

exposure to excess of light.

Vastaus:

exposure to high temperature.

exposure to excess of light.

exposure to excess of CO2.

exposure to shortage of soil moisture.

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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

Answer hidden

Vastaus:

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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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Vastaus:

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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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Vastaus:

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