What can be said about the action spectrum? You can bubble in more than one response for this question only. You may receive partial credit, but selecting one incorrect response will result in 0 points. This question is worth 2 points total.

• It correlates to the amount of oxygen produced.

• It trends higher as more pigments absorb light.

• It always reaches 0 when all pigments stop absorbing light.

• As it increases, sugar production increases as well.

• It is best described as a measure of CO2 production.

What is the main purpose of light-dependent reactions of photosynthesis?

Which of the following occurs during the light reactions?

What is the primary function of the Calvin cycle?

What is meant by phenotypic plasticity in roots and shoots?

The sieve-tube and companion cells together form the ________.

Calculate the water potential of a cell with Ψ P = 1 MPa and Ψ S = −3 MPa. Indicate whether there will be an overall net movement of water into or out of the cell if that cell is placed into a beaker in which Ψ S = −3 MPa.

The transport of a water column up a very tall tree can be explained by _____.

Which of the following would tend to increase transpiration? You can bubble in more than one response for this question only. You may receive partial credit, but selecting one incorrect response will result in 0 points. This question is worth 2 points total.

• Dry soil

• An increased number of stomata

• Spiny (thin) leaves

• A lower potential in the air surrounding the stomata

• A higher potential in the air surrounding the stomata

Which of the following is characteristic of ectomycorrhizal fungi (EMF)? You can bubble in more than one response for this question only. You may receive partial credit, but selecting one incorrect response will result in 0 points. This question is worth 2 points total.

• EMF form a sheath around root cells.

• EMF penetrate cell walls.

• EMF release peptidases to help break down decaying material in the soil.

• EMF hyphae resemble "small trees."

• EMF fixes nitrogen, unlike arbuscular mycorrhizal fungi (AMF).