Plant Hormones and Responses

The video tutorial explains coordination in plants, which involves responding to stimuli through movements. It distinguishes between movements independent of growth, like those in Mimosa and Sunflower, and growth-dependent movements, such as tendrils. The tutorial also covers plant hormones, including growth promoters like auxin, gibberellin, and cytokinin, and growth inhibitors like abscisic acid, highlighting their roles in plant growth and response to environmental stimuli.

What does coordination in plants primarily involve?

• Water absorption and nutrient transport

• Seed germination and flowering

• Photosynthesis and respiration

• Interaction of movements or responses to stimuli

Which plant is known for its rapid response to touch?

• Cactus

• Rose

• Mimosa

• Sunflower

How does the sunflower respond to day and night?

• By shedding leaves

• By moving its position

• By opening and closing its petals

• By changing color

What are tropic movements in plants?

• Movements due to water absorption

• Movements caused by wind

• Movements dependent on growth

• Movements independent of growth

What is the role of tendrils in pea plants?

• To store nutrients

• To help in climbing

• To produce flowers

• To absorb water

What are plant hormones also known as?

• Plant enzymes

• Plant growth regulators

• Plant nutrients

• Plant pigments

Which of the following is a growth promoter?

• Ethylene

• Gibberellin

• Auxin

• Abscisic acid

What is the function of auxins in plants?

• Close stomata

• Promote cell elongation

• Promote cell division

• Inhibit growth

Which hormone is responsible for inhibiting growth?

• Auxin

• Gibberellin

• Cytokinin

• Abscisic acid

What effect does cytokinin have on plants?

• Causes leaf wilting

• Closes stomata

• Inhibits seed germination

• Promotes cell division