Simple quiz

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Kysymys:

True/false question

Transpiration decreases as air becomes drier.

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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?

Atmospheric CO2

Soil nutrients

Soil water

Solar radiation

Vastaus:

Soil water

Soil nutrients

Atmospheric CO2

Solar radiation

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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

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 shortage of soil moisture.

exposure to high temperature.

exposure to excess of light.

exposure to excess of CO2.

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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

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

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Kysymys:

True/false question

The rate of respiration decreases with temperature.

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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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Vastaus:

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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

carbon dioxide.

oxygen.

Vastaus:

oxygen.

Palaute:

Photosynthesis releases oxygen whereas respiration releases CO2.

carbon dioxide.

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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

The annual cycle of photosynthesis mainly follows

the changes in soil temperature.

the changes in light.

the changes in air temperature.

the changes in CO2 concentration.

Vastaus:

the changes in air temperature.

the changes in CO2 concentration.

the changes in light.

the changes in soil temperature.

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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

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.