Simple quiz

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Pisteet yhteensä: 73 %

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Tulos 1 / 1

Kysymys:

True/false question

Carbon capture is performed by the green parts of plants via 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:

True/false question

Almost half of the total biomass of a tree may be allocated to the roots.

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Kysymys:

Multiple choice question

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

Soil nutrients

Solar radiation

Atmospheric CO2

Soil water

Vastaus:

Solar radiation

Soil nutrients

Atmospheric CO2

Soil water

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Kysymys:

True/false question

Plant respiration captures CO2.

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Vastaus:

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

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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.

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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

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

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

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Kysymys:

True/false question

The rate of respiration decreases with temperature.

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Kysymys:

Multiple choice question

Photoinhibition means the decrease in photosynthesis due to

exposure to high temperature.

exposure to shortage of soil moisture.

exposure to excess of CO2.

exposure to excess of light.

Vastaus:

exposure to excess of light.

exposure to high temperature.

exposure to excess of CO2.

exposure to shortage of soil moisture.

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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

High soil moisture leads to decreased photosynthesis.

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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

Photosynthesis of a tree canopy is driven or influenced by

soil moisture (REW).

air temperature (T).

the total leaf area (LAI).

air humidity (VPD).

atmospheric CO2.

photosynthetically active solar radiation (PAR).

Vastaus:

atmospheric CO2.

air temperature (T).

the total leaf area (LAI).

photosynthetically active solar radiation (PAR).

soil moisture (REW).

air humidity (VPD).