Simple quiz

Käyttäjä sai pisteitä 10 / 15
Pisteet yhteensä: 67 %

Vastaukset

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:

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:

True/false question

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

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Vastaus:

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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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Vastaus:

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Kysymys:

Multiple choice question

As plants respire, they release

oxygen.

carbon dioxide.

Vastaus:

oxygen.

carbon dioxide.

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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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Plant closes its stomata to avoid losing too much water.

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Kysymys:

Multiple choice question

Photoinhibition means the decrease in photosynthesis due to

exposure to shortage of soil moisture.

exposure to excess of light.

exposure to high temperature.

exposure to excess of CO2.

Vastaus:

exposure to shortage of soil moisture

exposure to excess of light

exposure to excess of CO2

exposure to high temperature

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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?

Soil nutrients

Atmospheric CO2

Soil water

Solar radiation

Vastaus:

Soil water

Atmospheric CO2

Soil nutrients

Solar radiation

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Kysymys:

True/false question

The rate of respiration decreases with temperature.

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Vastaus:

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Tulos 1 / 1

Kysymys:

Multiple choice question

Photosynthesis of a tree canopy is driven or influenced by

air temperature (T).

the total leaf area (LAI).

soil moisture (REW).

atmospheric CO2.

photosynthetically active solar radiation (PAR).

air humidity (VPD).

Vastaus:

atmospheric CO2.

photosynthetically active solar radiation (PAR).

the total leaf area (LAI).

soil moisture (REW).

air temperature (T).

air humidity (VPD).

Tulos 1 / 1

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

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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Vastaus:

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Kysymys:

True/false question

High soil moisture leads to decreased photosynthesis.

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Vastaus:

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Väärin

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 CO2 concentration.

the changes in light.

the changes in air temperature.

the changes in soil temperature.

Vastaus:

the changes in CO2 concentration.

the changes in air temperature.

the changes in light.

the changes in soil temperature.