Readiness test (NA Biology- Transport & Nutrition in Plants)

Which of the following best describes photosynthesis?

• Chemical energy captured by chlorophyll is converted to light energy using oxygen, glucose and water.

• Light energy captured by chlorophyll is converted to chemical energy to form oxygen, glucose and water.

• Light energy captured by chlorophyll is converted to chemical energy to form carbon dioxide and water.

• Chemical energy captured by chlorophyll is converted to chemical energy to form carbon dioxide and water.

The following statement describes transpiration. Fill in the blank with an appropriate word/phrase.

Transpiration is the loss of _________________ through aerial parts of a plant, through the stomata found on leaves.

Which statement best describes how light intensity affects the rate of photosynthesis?

• Increasing light intensity increases rate of photosynthesis as there is increased energy captured to power the reaction.

• Increasing light intensity decreases rate of photosynthesis as there is decreased loss of water to power the reaction.

• Decreasing light intensity has no effect on rate of photosynthesis as it is determined only by temperature.

• All of the above.

Check the options that correctly matches the condition to its effect on rate of transpiration.

• Increased temperature increases rate of transpiration.

• Increased humidity increases rate of transpiration.

• Decreased light intensity decreases rate of transpiration.

• Increased wind speed increases rate of transpiration.

Decreasing air humidity (i.e. drier air) _____________________ between the leaf and the atmosphere, which increases rate of transpiration

The increase in temperature increases the rate of evaporation of water from the ____________________________________ covering the surface of the spongy mesophyll cells, which in turn increases the rate of transpiration.

Transpiration pull is caused by the loss of water vapour through the stomata, which in turn leads to the movement of water from the xylem the neighbouring cells via __________________ .

Which two experiments can be used to show that carbon dioxide concentration is the limiting factor?

• Expts 1 and 4

• Expts 1 and 3

• Expts 1 and 2

• Expts 2 and 3

When given a graph/set of data, it is important quote data values (x,y) and also to look at the following 3 points:

When given an experimental set-up, it is important to know aim of the experiment, as well as the following: