Plant Tropisms

This plant is growing towards the light, this is an example of ___________.

• phototropism

• geotropism

• hydrotropism

• thigmotropism

A plant's response to an environmental stimuli is known as a _______.

• tropism

• photosynthesis

• germination

• pollination

True or False: Temperature is a major influence on plant growth.

• True

• False

• Sometimes

• Not at all

What happens to a plant's growth if it is not exposed to light?

• It may grow weak and elongated, a condition known as etiolation.

• It will grow faster and stronger.

• It will produce more flowers and fruits.

• It will remain the same size.

What is the term for a plant's growth response to gravity?

• gravitropism

• phototropism

• hydrotropism

• thigmotropism

According to this graph what temperature do the plants tested grow best?

• 20 degrees Celsius

• 22 degrees Celsius

• 24 degrees Celsius

• 26 degrees Celsius

Define hydrotropism.

• The growth of a plant's roots towards moisture or water.

• The process by which plants grow towards light.

• The ability of plants to absorb nutrients from the soil.

• The phenomenon of plants responding to gravity.

This plant is growing its roots towards water, this is an example of ___________.

• hydrotropism

• phototropism

• geotropism

• thigmotropism

How do plants sense gravity?

• Plants use specialized cells called statocytes that contain statoliths to detect gravity.

• Plants sense gravity through their leaves using phototropism.

• Plants rely on their root systems to feel gravitational pull.

• Plants use their flowers to determine the direction of gravity.

Define phototropism.

• The growth of a plant towards light.

• The process of photosynthesis in plants.

• The ability of plants to grow in any direction regardless of light.

• The phenomenon of plants losing leaves in autumn.