Plant Defense and Biodiversity Study Questions

Choose a study mode

Play Quiz

Study Flashcards

Spaced Repetition

Chat to Lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is the distinction between basal resistance and specific resistance in plants?

Basal resistance is mediated by siRNAs, while specific resistance relies on hypersensitive responses.
Basal resistance is non-specific and provides general protection, while specific resistance targets particular pathogens. (correct)
Basal resistance involves physical barriers, while specific resistance involves chemical defenses.
Basal resistance is only effective against avirulent infections, while specific resistance is essential for combating virulent infections.

How do plants evolve to resist herbivory?

By adapting physical structures like thorns and spines to deter herbivores. (correct)
By increasing siRNA production in response to herbivores.
By enhancing basal resistance mechanisms against herbivorous pathogens.
By promoting hypersensitive immune responses upon herbivore attack.

What is the primary function of siRNAs in plant defense?

To enhance hypersensitive immune responses.
To target and regulate gene expression of invading pathogens. (correct)
To induce basal resistance mechanisms.
To directly kill necrotrophic pathogens.

Why do plants modulate some of their defenses?

To avoid exhausting limited resources needed for defense mechanisms. (A) Signup and view all the answers

What are the major evolutionary adaptations of angiosperms that set them apart from other plant groups?

Angiosperms produce seeds enclosed in fruit, a unique feature not found in other plant groups. (B) Signup and view all the answers

What is the difference between basal resistance and specific resistance in plants?

Basal resistance is constitutive, while specific resistance is induced. (B) Signup and view all the answers

What is a hypersensitive immune response to infection by a plant?

A localized cell death response triggered to prevent the spread of infection (C) Signup and view all the answers

How have plants evolved to resist herbivory?

By increasing the production of toxins in response to herbivore attacks (B) Signup and view all the answers

Against what type of pathogen are siRNAs effective, and how do they work?

Effective against viruses by degrading their RNA (B) Signup and view all the answers

What are the major differences between biotrophic and necrotrophic pathogens?

Biotrophic pathogens require living plant cells to complete their life cycle, while necrotrophic pathogens kill cells to feed. (C) Signup and view all the answers

Flashcards are hidden until you start studying