Simple quiz

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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

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

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

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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

Photosynthesis of a tree canopy is driven or influenced by

soil moisture (REW).

air temperature (T).

air humidity (VPD).

photosynthetically active solar radiation (PAR).

the total leaf area (LAI).

atmospheric CO2.

Vastaus:

atmospheric CO2.

the total leaf area (LAI).

soil moisture (REW).

air humidity (VPD).

air temperature (T).

photosynthetically active solar radiation (PAR).

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Kysymys:

True/false question

The rate of respiration decreases with temperature.

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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

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

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Kysymys:

Multiple choice question

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

Atmospheric CO2

Solar radiation

Soil nutrients

Soil water

Vastaus:

Atmospheric CO2

Soil water

Soil nutrients

Solar radiation

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Kysymys:

True/false question

Plants open its stomata to avoid losing too much water.

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Plant closes its stomata to avoid losing too much water.

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Kysymys:

Multiple choice question

As plants respire, they release

carbon dioxide.

oxygen.

Vastaus:

oxygen.

carbon dioxide.

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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

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

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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 light.

exposure to excess of CO2.

exposure to shortage of soil moisture.

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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.