Simple quiz

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Kysymys:

Multiple choice question

As plants respire, they release

carbon dioxide.

oxygen.

Vastaus:

carbon dioxide.

oxygen.

Palaute:

Photosynthesis releases oxygen whereas respiration releases CO2.

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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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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

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

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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:

True/false question

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

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Kysymys:

Multiple choice question

Photosynthesis of a tree canopy is driven or influenced by

air temperature (T).

the total leaf area (LAI).

soil moisture (REW).

photosynthetically active solar radiation (PAR).

air humidity (VPD).

atmospheric CO2.

Vastaus:

the total leaf area (LAI).

photosynthetically active solar radiation (PAR).

soil moisture (REW).

atmospheric CO2.

air humidity (VPD).

air temperature (T).

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Kysymys:

True/false question

De-hardening in spring involves gradual re-hydration of the cells, recovery of photosynthetic capacity and a tight control of water loss.

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Kysymys:

Multiple choice question

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

Soil nutrients

Soil water

Solar radiation

Atmospheric CO2

Vastaus:

Atmospheric CO2

Soil nutrients

Soil water

Solar radiation

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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

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

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

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

atmospheric oxygen.

soil heat.

soil nutrients.

sun light.

Vastaus:

atmospheric oxygen.

soil heat.

sun light.

soil nutrients.

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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 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

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

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