Plant Tropisms and Growth Responses

The video introduces plant tropisms, which are directional responses of plants to environmental stimuli, often involving hormones. It covers phototropism, where plants grow towards light, thigmotropism, where plants respond to touch, and gravitropism, where plants orient themselves according to gravity. Examples include plants bending towards light, climbing plants winding around objects, and roots growing downward while shoots grow upward.

What is the primary factor involved in plant tropisms?

• Temperature changes

• Soil nutrients

• Plant hormones

• Water availability

Which type of tropism involves a plant's response to light?

• Thigmotropism

• Phototropism

• Hydrotropism

• Gravitropism

What is an example of thigmotropism?

• A climbing plant winding around a trellis

• Leaves closing at night

• Roots growing downward

• A plant bending towards sunlight

How do roots and shoots respond to gravity?

• Both grow upward

• Roots grow downward, shoots grow upward

• Roots grow upward, shoots grow downward

• Both grow sideways

What happens to a plant's growth direction if it is placed on its side?

• Roots grow downward, shoots grow upward

• Roots and shoots stop growing

• Roots grow sideways, shoots grow downward

• Both roots and shoots grow sideways