Simple quiz

Käyttäjä sai pisteitä 8 / 15
Pisteet yhteensä: 53 %

Vastaukset

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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Vastaus:

Käyttäjän vastaus
Oikein
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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
Oikein

An increment in leaf area increases also the photosynthesis of a tree stand. However, the relationship is saturating.

Tulos 1 / 1

Kysymys:

True/false question

The rate of respiration decreases with temperature.

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Vastaus:

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(skipped)

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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Vastaus:

Käyttäjän vastaus
Tulos 1 / 1

Kysymys:

True/false question

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

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Vastaus:

Käyttäjän vastaus
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Kysymys:

Multiple choice question

Photosynthesis of a tree canopy is driven or influenced by

the total leaf area (LAI).

air humidity (VPD).

air temperature (T).

soil moisture (REW).

atmospheric CO2.

photosynthetically active solar radiation (PAR).

Vastaus:

air temperature (T).

soil moisture (REW).

air humidity (VPD).

photosynthetically active solar radiation (PAR).

the total leaf area (LAI).

atmospheric CO2.

Tulos 0 / 1

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 soil temperature.

the changes in air temperature.

the changes in CO2 concentration.

the changes in light.

Tulos 1 / 1

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

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

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Vastaus:

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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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Vastaus:

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Kysymys:

True/false question

When there is low soil moisture, plants close its stomata pores which then decreases photosynthesis.

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Vastaus:

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Tulos 1 / 1

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:

True/false question

Plant respiration captures CO2.

Answer hidden

Vastaus:

Käyttäjän vastausFeedback
Väärin

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

Tulos 0 / 1

Kysymys:

True/false question

Transpiration decreases as air becomes drier.

Answer hidden

Vastaus:

Käyttäjän vastaus
Oikein
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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:

Soil water

Atmospheric CO2

Soil nutrients

Solar radiation