Plant Growth: Auxins and Gibberellins

The video explores how plants grow and respond to light and gravity through hormones like auxins, cytokinins, and gibberellins. Auxins influence plant bending by affecting cell growth differently in stems and roots. Phototropism and geotropism are explained, showing how plants grow towards light and respond to gravity. Cytokinins and gibberellins also play roles in plant growth, with gibberellins aiding in seed germination and flowering.

What causes plants to bend towards the light?

• The breakdown of auxins on the light side

• The production of cytokinins

• The presence of eyes in plants

• The growth of roots towards the light

How do auxins affect root growth in response to light?

• They cause roots to grow more on the light side

• They have no effect on root growth

• They cause roots to grow less on the shaded side

• They make roots grow towards the light

What is the role of cytokinins in plant growth?

• They are responsible for root elongation

• They inhibit the growth of stems

• They work independently of auxins

• They work alongside auxins

Which hormone is responsible for converting starch into sugars during seed germination?

• Auxins

• Cytokinins

• Gibberellins

• Ethylene

What additional roles do gibberellins play in plant development?

• They only assist in root growth

• They solely focus on leaf growth

• They prevent seed germination

• They stimulate flowering and fruit production