Simple quiz

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Pisteet yhteensä: 40 %

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Tulos 0 / 1

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.

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Kysymys:

Multiple choice question

Photoinhibition means the decrease in photosynthesis due to

exposure to excess of light.

exposure to excess of CO2.

exposure to shortage of soil moisture.

exposure to high temperature.

Vastaus:

exposure to excess of CO2

exposure to excess of light

exposure to shortage of soil moisture

exposure to high temperature

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Kysymys:

Multiple choice question

Photosynthesis of a tree canopy is driven or influenced by

photosynthetically active solar radiation (PAR).

atmospheric CO2.

soil moisture (REW).

air temperature (T).

the total leaf area (LAI).

air humidity (VPD).

Vastaus:

air temperature (T).

air humidity (VPD).

photosynthetically active solar radiation (PAR).

atmospheric CO2.

the total leaf area (LAI).

soil moisture (REW).

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Kysymys:

Multiple choice question

As plants respire, they release

carbon dioxide.

oxygen.

Vastaus:

carbon dioxide.

oxygen.

Palaute:

Photosynthesis releases oxygen whereas respiration releases CO2.

Tulos 1 / 1

Kysymys:

Multiple choice question

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

Soil water

Atmospheric CO2

Soil nutrients

Solar radiation

Vastaus:

Soil water

Solar radiation

Atmospheric CO2

Soil nutrients

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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

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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Tulos 1 / 1

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 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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Tulos 1 / 1

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

The annual cycle of photosynthesis mainly follows

the changes in light.

the changes in soil temperature.

the changes in air temperature.

the changes in CO2 concentration.

Vastaus:

the changes in CO2 concentration.

the changes in soil temperature.

the changes in air temperature.

the changes in light.

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Kysymys:

Multiple choice question

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

sun light.

soil nutrients.

atmospheric oxygen.

soil heat.

Vastaus:

soil heat.

atmospheric oxygen.

sun light.

soil nutrients.

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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

Carbon capture is performed by the green parts of plants via photosynthesis.

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