4/5 Plant Response

 A stimulus is ___________

• a change in an organisms surroundings.
•  process in which organisms grow larger.
• a reaction to a change in surroundings
• the result of sexual reproduction.

Which of the following is an organism’s reaction to a change in its surroundings?

• response 
• distraction
• stimulus
• development

Which of the following responses is a plant growing toward or leaning toward light?

• thigmotropism
• hydrotropism
• phototropism
• gravitropism

A sunflower turns toward the sun, what type of tropism would this be? 

• Hypothyroidism 
• Phototropism
• Thigmotropism
• Geotropism

A plant's root grow in a downward direction in response to what force? 

• sunlight
• gravity
• soil
• turgor pressure

Which type of tropism?

• hydrotropism
• thigmotropism
• phototropism
• geotropism (Gravitropism)

If a plant experiences a gravitropism, then it will do what?

• Grow toward or away from light. 
• Grow away from light. 
• Grow toward light.
• Grow in response to gravity. 

A vine plant brushes against a fence and wraps itself around the fence. To what response is the stimulus is the plant responding to?

• phototropism

• gravitropism

• hydrotropism

• thigmotropism

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

True or False: Gravitropism can be either negative or positive

• True

• False