Simple quiz

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Pisteet yhteensä: 73 %

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Kysymys:

True/false question

Transpiration decreases as air becomes drier.

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Kysymys:

Multiple choice question

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

sun light.

soil heat.

soil nutrients.

atmospheric oxygen.

Vastaus:

sun light.

soil heat.

soil nutrients.

atmospheric oxygen.

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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

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:

True/false question

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

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Kysymys:

Multiple choice question

Photosynthesis of a tree canopy is driven or influenced by

atmospheric CO2.

photosynthetically active solar radiation (PAR).

soil moisture (REW).

air temperature (T).

the total leaf area (LAI).

air humidity (VPD).

Vastaus:

atmospheric CO2.

photosynthetically active solar radiation (PAR).

air humidity (VPD).

soil moisture (REW).

the total leaf area (LAI).

air temperature (T).

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Kysymys:

Multiple choice question

Photoinhibition means the decrease in photosynthesis due to

exposure to shortage of soil moisture.

exposure to high temperature.

exposure to excess of light.

exposure to excess of CO2.

Vastaus:

exposure to high temperature.

exposure to excess of light.

exposure to shortage of soil moisture.

exposure to excess of CO2.

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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

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

Atmospheric CO2

Soil water

Soil nutrients

Solar radiation

Vastaus:

Soil nutrients

Soil water

Solar radiation

Atmospheric CO2

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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

The rate of respiration decreases with temperature.

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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

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:

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.