Simple quiz

You got 10 of 15 possible points.
Your score was: 67 %

Question Results

Score 1 of 1

Question:

Multiple choice question

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

Solar radiation

Atmospheric CO2

Soil nutrients

Soil water

Response:

Atmospheric CO2

Soil water

Soil nutrients

Solar radiation

Score 0 of 1

Question:

True/false question

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

Answer hidden

Response:

User answer
True
Score 0 of 1

Question:

True/false question

The rate of respiration decreases with temperature.

Answer hidden

Response:

User answer
True
Score 1 of 1

Question:

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.

Answer hidden

Response:

User answer
True
Score 1 of 1

Question:

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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Response:

User answer
True
Score 1 of 1

Question:

True/false question

Transpiration decreases as air becomes drier.

Answer hidden

Response:

User answer
False
Score 1 of 1

Question:

True/false question

Plant respiration captures CO2.

Answer hidden

Response:

User answerFeedback
False

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

Score 0 of 1

Question:

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.

Answer hidden

Response:

User answer
False
Score 1 of 1

Question:

Multiple choice question

Photoinhibition means the decrease in photosynthesis due to

exposure to high temperature.

exposure to excess of light.

exposure to excess of CO2.

exposure to shortage of soil moisture.

Response:

exposure to high temperature

exposure to excess of light

exposure to excess of CO2

exposure to shortage of soil moisture

Score 1 of 1

Question:

Multiple choice question

Photosynthesis of a tree canopy is driven or influenced by

air temperature (T).

air humidity (VPD).

soil moisture (REW).

atmospheric CO2.

the total leaf area (LAI).

photosynthetically active solar radiation (PAR).

Response:

air temperature (T).

photosynthetically active solar radiation (PAR).

atmospheric CO2.

the total leaf area (LAI).

air humidity (VPD).

soil moisture (REW).

Score 0 of 1

Question:

Multiple choice question

The annual cycle of photosynthesis mainly follows

the changes in CO2 concentration.

the changes in soil temperature.

the changes in air temperature.

the changes in light.

Response:

the changes in light.

the changes in soil temperature.

the changes in air temperature.

the changes in CO2 concentration.

Score 1 of 1

Question:

True/false question

At low air humidity, a plant closes its stomata to prevent transpiration. The action also decreases photosynthesis

Answer hidden

Response:

User answer
True
Score 1 of 1

Question:

True/false question

Plants open its stomata to avoid losing too much water.

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Response:

User answerFeedback
False

Plant closes its stomata to avoid losing too much water.

Score 1 of 1

Question:

True/false question

High soil moisture leads to decreased photosynthesis.

Answer hidden

Response:

User answerFeedback
False

In boreal upland forests, low soil moisture decreases the rate of photosynthesis.

Score 0 of 1

Question:

Multiple choice question

As plants respire, they release

carbon dioxide.

oxygen.

Response:

oxygen.

Feedback:

Photosynthesis releases oxygen whereas respiration releases CO2.

carbon dioxide.