plant sensitvity + sensation in man part 1

central nervus system ocnsists of .......

• brain only

• spinal cord only

• nerves

• brain and spinal cord

What is the role of auxin that causes a plant to bend towards light?

• The concentration of auxin in the plant increases when there is light.

• Auxin causes uniform growth on every stem.

• Auxin causes cells that are on the dark side to grow faster.

• Auxin causes the increase in the number of plant cells.

What is the reaction that is shown by the plant in the figure above?

• Positive hydrotropism.

• Negative phototropism.

• Positive thigmotropism.

• Negative geotropism.

Leaves of ______ plant close when touched.

• Cactus

• Mimosa

• Sunflower

• Rose

This is a picture of Mimosa Pudica. Mimosa Pudica leaves close after being touched. It shows that this plant is sensitive.

• TRUE

• FALSE

What is tropism?

• A plant's response to a stimulus

• A plant reproducing

• An animal's response to a stimulus

• A prokaryote's response to a stimulus

What is gravitropism/geotropism?

• The movement of a plant in response to gravity

• The movement of a plant in response to earthquakes

• The movement of bacteria in response to changes in temperature

• The movement of plants towards water

What is hydrotropism?

• The movement of plants towards water

• The movement of plants away from water

• The rate of growth of a plant in response to temperature changes in water

• A plant's response to gravity and touch

What is phototropism?

• The movement of plants towards light

• The movement of plants away from light

• The movement of plants in response to infrared light

• The movement of plants towards water

The roots have negative

• phtotropism

• Thigmotropism

• Gravitropism

• Hormones