Question 1

Which of the following best describes the function of hyphae in fungi?

Accepted Answer

Hyphae are filamentous structures that increase surface area for nutrient absorption.

Question 2

A plant cell is placed in a solution with a lower solute concentration than its cytoplasm. What will happen to the cell, and which equation describes the water potential driving this process?

Accepted Answer

The cell will gain water and become turgid, described by $$\Psi = \Psi_s + \Psi_p.$$

Question 3

Which of the following is NOT a function of the vascular tissue in plants?

Accepted Answer

Storage of genetic information for reproduction

Question 4

Which process is primarily responsible for the movement of water from roots to leaves in tall trees?

Accepted Answer

Transpiration pull generated by evaporation at leaf surfaces

Question 5

A gardener notices that a plant's leaves are wilting despite regular watering. Which of the following is the most likely explanation?

Accepted Answer

The plant's roots are damaged, reducing water uptake.

Question 6

Which hormone is most directly involved in the regulation of stomatal opening and closing in response to drought stress?

Accepted Answer

Abscisic acid (ABA)

Question 7

Which of the following best explains why phloem transport is considered bidirectional?

Accepted Answer

Phloem moves sugars from sources to sinks, which can be in different directions depending on the season.

Question 8

Which equation correctly represents the relationship between solute potential ($$\Psi_s$$), pressure potential ($$\Psi_p$$), and total water potential ($$\Psi) in $$plant cells?

Accepted Answer

$$\Psi = \Psi_s + \Psi_p$$

Question 9

A plant exposed to red light and far-red light in alternating cycles will show which type of response, and which pigment is responsible?

Accepted Answer

Photoperiodism, controlled by phytochrome

Question 10

Which of the following best describes the role of mycorrhizal fungi in plant nutrition?

Accepted Answer

They increase the plant's ability to absorb water and minerals from the soil.

Question 11

Which structure in vascular plants is primarily responsible for secondary growth?

Accepted Answer

Vascular cambium

Question 12

A scientist measures the rate of photosynthesis in a leaf under different light intensities. Which variable is most likely to limit the rate at very high light intensities?

Accepted Answer

Concentration of carbon dioxide

Question 13

Which of the following is a correct statement about the movement of sugars in the phloem?

Accepted Answer

Sugars are actively transported into sieve tube elements at the source.

Question 14

Which of the following best explains the difference between monocot and dicot stem vascular tissue arrangement?

Accepted Answer

Monocots have scattered vascular bundles, while dicots have them arranged in a ring.

Question 15

Which of the following is a direct result of the Casparian strip in root endodermal cells?

Accepted Answer

It forces water and solutes to cross the plasma membrane before entering the vascular cylinder.

Question 16

A plant is exposed to a pathogen and subsequently increases production of phytoalexins. This is an example of:

Accepted Answer

Systemic acquired resistance

Question 17

Which of the following best describes the process of secondary growth in woody plants?

Accepted Answer

Increase in girth due to activity of lateral meristems

Question 18

Which of the following is the main function of stomata in plant leaves?

Accepted Answer

Regulation of gas exchange and water loss

Question 19

A plant is grown in soil with very low nitrogen content. Which adaptation would most likely help the plant survive?

Accepted Answer

Symbiotic relationship with nitrogen-fixing bacteria

Question 20

Which of the following best explains the role of auxin in phototropism?

Accepted Answer

Auxin accumulates on the shaded side of the stem, causing cells to elongate and the stem to bend toward light.

Study Guide: Fungi, Vascular Plant Structure, Growth, Transport, and Responses

Study Guide - Practice Questions

Study Guide - Flashcards