Question 1

Which of the following best describes allelopathy in plants?

Accepted Answer

The release of chemicals by a plant to inhibit the growth of nearby competing plants.

Question 2

Which structure is primarily responsible for nitrogen fixation in legumes?

Accepted Answer

Root nodules

Question 3

A plant is observed to secrete a waxy substance that prevents water loss and pathogen entry. Which compound is most likely responsible for this function?

Accepted Answer

Suberin

Question 4

Which of the following is a correct description of the hypersensitive response (HR) in plants?

Accepted Answer

A rapid, localized cell death at the site of infection to prevent pathogen spread.

Question 5

Which of the following best explains the function of carnivorous plants in nutrient-poor environments?

Accepted Answer

They obtain additional nutrients, especially nitrogen, by digesting animal prey.

Question 6

Which of the following is an example of a secondary metabolite in plants?

Accepted Answer

Alkaloids

Question 7

A plant is exposed to a pathogen and subsequently increases its resistance to future infections throughout its tissues. What is this phenomenon called?

Accepted Answer

Systemic Acquired Resistance (SAR)

Question 8

Which of the following best describes the function of root hairs?

Accepted Answer

Increasing the surface area for water and mineral absorption.

Question 9

Which plant hormone is most closely associated with the wound response and the production of defense proteins?

Accepted Answer

Jasmonic acid

Question 10

A soil sample is found to have high salinity. What is the most likely effect on most plants growing in this soil?

Accepted Answer

Reduced water uptake due to osmotic stress.

Question 11

Which of the following best describes the function of humus in soil?

Accepted Answer

Improves soil structure and water retention.

Question 12

Which of the following is a function of microproteins in plant cells?

Accepted Answer

Regulation of gene expression by interacting with transcription factors.

Question 13

Which of the following best describes the role of systemin in plants?

Accepted Answer

It is a signaling peptide involved in the wound response.

Question 14

Which of the following is a correct statement about static plant defenses?

Accepted Answer

They are always present in the plant, regardless of attack.

Question 15

Which of the following best describes the function of bedrock in the context of soil formation?

Accepted Answer

It is the parent material from which soil is formed through weathering.

Question 16

Which of the following is a correct description of induced plant defenses?

Accepted Answer

They are activated in response to specific threats such as herbivores or pathogens.

Question 17

Which of the following best describes the function of rhizobium in plant biology?

Accepted Answer

It is a bacterium that forms symbiotic relationships with legumes to fix atmospheric nitrogen.

Question 18

Which of the following is a likely consequence if a plant's phloem is damaged by an insect?

Accepted Answer

Disruption of sugar transport from leaves to other parts of the plant.

Question 19

Which of the following best describes the function of protease inhibitors in plant defense?

Accepted Answer

They inhibit digestive enzymes in herbivores, reducing damage to the plant.

Question 20

A plant is exposed to a pathogen and produces salicylic acid. What is the most likely outcome of this response?

Accepted Answer

Activation of systemic acquired resistance (SAR) throughout the plant.

Lesson 17: Plant Defenses, Nutrition, and Soil Vocabulary Study Guide

Study Guide - Practice Questions

Study Guide - Flashcards