Exam 38: Plant Responses to Environmental Challenges

In a lab test, when leaves of an infected plant are placed in a culture plate adjacent to pathogenic bacteria, the bacteria die.This provides evidence that the plant is likely producing

Which character is not a plant adaptation to a dry environment?

Which substances are usually produced within hours of infection and are toxic to many bacteria and fungi?

What type of signaling is involved when a plant perceives and responds to pathogens?

Plants with long dormant periods interrupted by short periods of rapid growth and reproduction typically live in _______ environments.

Refer to the figure. This hornworm is engaged in an evolutionary arms race with the tobacco plant.Which statement about the plant's response to this herbivore is false?

Nicotine helps to defend plants against herbivores by acting as a(n)

Defensive water-soluble secondary compounds formed by plants are most commonly stored in the

If a leaf on a plant is eaten by herbivores, the plant increases the concentration of alkaloids in the sharp trichomes on leaves that are produced subsequently.This increased production of alkaloids is an example of a(n)

Salicylic acid production by a plant tends to result in

In the gene-for-gene resistance mechanism, if a plant has a resistance gene and a pathogen has the matching Avr gene, the

Glucosinolates help to protect plants against herbivores by

A newly discovered relative of the rubber tree most likely uses _______ as its main and most effective defense against herbivores.

Plants sometimes protect themselves from their own toxic secondary metabolites by

Alkaloids are typically used by plants in defense

Which quality best characterizes systemic acquired resistance?

There is currently an urgent need for the development of _______ strains that are resistant to a fungal infection called rust.

Halophytes

Because wet soils are often deficient in _______, submerged root systems often grow _______.

Which element is not a heavy metal?