Simple quiz

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Kysymys:

Multiple choice question

The annual cycle of photosynthesis mainly follows

the changes in CO2 concentration.

the changes in air temperature.

the changes in soil temperature.

the changes in light.

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

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

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Kysymys:

Multiple choice question

As plants respire, they release

carbon dioxide.

oxygen.

Vastaus:

carbon dioxide.

oxygen.

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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:

Multiple choice question

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

atmospheric oxygen.

soil nutrients.

soil heat.

sun light.

Vastaus:

soil heat.

soil nutrients.

sun light.

atmospheric oxygen.

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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

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

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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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Vastaus:

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Kysymys:

Multiple choice question

Photoinhibition means the decrease in photosynthesis due to

exposure to high temperature.

exposure to excess of CO2.

exposure to shortage of soil moisture.

exposure to excess of light.

Vastaus:

exposure to excess of light.

exposure to excess of CO2.

exposure to high temperature.

exposure to shortage of soil moisture.

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Kysymys:

True/false question

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

Answer hidden

Vastaus:

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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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Vastaus:

Käyttäjän vastausFeedback

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

Plants open its stomata to avoid losing too much water.

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Vastaus:

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Väärin

Plant closes its stomata to avoid losing too much water.

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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.

Answer hidden

Vastaus:

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Kysymys:

True/false question

Transpiration decreases as air becomes drier.

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Vastaus:

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