Simple quiz

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Kysymys:

True/false question

High soil moisture leads to decreased photosynthesis.

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

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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

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

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

Soil water

Solar radiation

Soil nutrients

Atmospheric CO2

Vastaus:

Atmospheric CO2

Solar radiation

Soil nutrients

Soil water

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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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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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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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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

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

soil heat.

sun light.

atmospheric oxygen.

soil nutrients.

Vastaus:

sun light.

atmospheric oxygen.

soil nutrients.

soil heat.

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Kysymys:

Multiple choice question

Photosynthesis of a tree canopy is driven or influenced by

photosynthetically active solar radiation (PAR).

the total leaf area (LAI).

soil moisture (REW).

air humidity (VPD).

atmospheric CO2.

air temperature (T).

Vastaus:

soil moisture (REW).

atmospheric CO2.

air temperature (T).

air humidity (VPD).

photosynthetically active solar radiation (PAR).

the total leaf area (LAI).

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Kysymys:

True/false question

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

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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

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

As plants respire, they release

oxygen.

carbon dioxide.

Vastaus:

carbon dioxide.

oxygen.

Palaute:

Photosynthesis releases oxygen whereas respiration releases CO2.