Simple quiz

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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

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

Plant respiration captures CO2.

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

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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

Photoinhibition means the decrease in photosynthesis due to

exposure to high temperature.

exposure to excess of light.

exposure to excess of CO2.

exposure to shortage of soil moisture.

Vastaus:

exposure to excess of CO2.

exposure to high temperature.

exposure to shortage of soil moisture.

exposure to excess of light.

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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

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

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

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Kysymys:

Multiple choice question

The annual cycle of photosynthesis mainly follows

the changes in air temperature.

the changes in CO2 concentration.

the changes in soil temperature.

the changes in light.

Vastaus:

the changes in CO2 concentration.

the changes in light.

the changes in air temperature.

the changes in soil temperature.

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Kysymys:

Multiple choice question

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

Soil water

Soil nutrients

Atmospheric CO2

Solar radiation

Vastaus:

Atmospheric CO2

Solar radiation

Soil water

Soil nutrients

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Kysymys:

Multiple choice question

Photosynthesis of a tree canopy is driven or influenced by

the total leaf area (LAI).

atmospheric CO2.

air humidity (VPD).

air temperature (T).

photosynthetically active solar radiation (PAR).

soil moisture (REW).

Vastaus:

atmospheric CO2.

photosynthetically active solar radiation (PAR).

soil moisture (REW).

air humidity (VPD).

the total leaf area (LAI).

air temperature (T).

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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

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

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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

As plants respire, they release

oxygen.

carbon dioxide.

Vastaus:

carbon dioxide.

oxygen.

Palaute:

Photosynthesis releases oxygen whereas respiration releases CO2.