Growth and Development

A hormone manufactured primarily in the shoot tips, in embryos, and in parts of developing flowers and seeds.

• a. auxin

• b. cytokinin

• c. gibberellins

• d. ethylene

A hormone that stimulates stem elongation

• a. tropism

• b. auxin

• c. gibberellins

• d. cytokinin

Which of the following shows the correct relationship between a hormone and its function?

• a. auxin=stimulates stem elongation

• b. ethylene=fruit maturation

• c. cytokinin=drought tolerance

• d. absisic acid=promote root growth

Growth of plant part toward the stimulus

• a. positive tropism

• b. negative tropism

It is a leaf movement or orientation following the direction of the sun’s ray.

• a. Heliotropism

• b. Geotropism

• c. Hydrotropism

• d. Gravitropism

Growth away from gravity

• a. positive geotropism

• b. negative geotropism

Apparent lengthening of legs

• at birth

• 1 month

• 6 months

• 5 months

walks independently

• 12-15 months

• 18 months

• 24 months

• 30-36 months

Which hormone is primarily responsible for cell division and growth in plants?

• Auxin

• Cytokinin

• Gibberellin

• Ethylene

What is the process by which plants grow towards light called?

• Phototropism

• Geotropism

• Hydrotropism

• Thigmotropism