Tropisms and Hormones

Phototropism is a a plants response to what type of stimulus?

• Light

• Darkness

• Touch

• Gravity

In most cases, a plants response to stimuli is slow and gradual so that it is hard to see it happen, unless using a time-lapse video recording. But there are exceptions, where the response to a stimuli is quick, such as which type of plant?

• Carnation

• Poinsettia

• Rose

• Venus Flytrap

Which growth response allows plant tendrils to wrap around an object?

• gravitropism

• phototropism

• thigmotropism

• photoperiodism

Which of the following is an example of a chemical stimulus?

• light

• touch

• gravity

• hormones

The growth of a plant with or against gravity is called?

• Stimuli

• Phototropism

• Thigmotropism

• Geotropism

This plant hormone helps stimulate the ripening of fruit. It is a gas that can be produced by fruits, seeds, flowers, and leaves. It can cause other fruits to ripen or even rot, and can also cause plants to drop their leaves.

• Auxin

• Ethylene

• Gibberellins

• Cytokinins

Thigmotropism is a plants response to what type of stimuli?

• Light

• Darkness

• Touch

• Gravity

Geotropism is a plants response to what type of stimuli?

• Light

• Darkness

• Touch

• Gravity

The diagram shows a plant growing while lying on its side. How is the plant reacting positively and negatively to gravity?

• the root are reacting negatively by growing downward while the stem and leaves are reacting positively by growing upward

• the root are reacting positively by growing downward while the stem and leaves are reacting negatively by growing upward

• only the roots are reacting by growing downward

• only the leaves and stem are reacting by growing upward

Tags

NGSS.MS-LS1-5

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