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Response to Environment

Authored by Charles Martinez

Biology

12th Grade

NGSS covered

Response to Environment
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14 questions

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1.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Plants growing in a partially dark environment will grow toward light in a response called phototropism. Which of the following statements is true regarding phototropism? 

It is caused by an electrical signal.
One chemical involved is ethylene. 
Auxin causes a growth increase on one side of the stem.
Auxin causes a decrease in growth on the side of the stem exposed to light. 

2.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

We know from the experiments of the past that plants bend toward light because 

they need sunlight energy for photosynthesis. 
cell expansion is greater on the dark side of the stem. 
the sun stimulates stem growth. 
auxin is inactive on the dark side of the stem. 

Tags

NGSS.HS-LS1-5

3.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

The ripening of fruit and the dropping of leaves and fruit are principally controlled by 

auxins. 
cytokinins.
ethylene. 
carbon dioxide concentration (in air).

4.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Which of the following hormones would never be found in high concentrations in a dormant overwintering flower bud? 

ethylene
abscisic acid 
cytokinins 
auxin 

5.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

If you were shipping green bananas to a supermarket thousands of miles away, which of the following chemicals would you want to eliminate from the plants' environment? 

CO₂ 
cytokinins 
ethylene 
auxin 

6.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Which of the following plant growth responses is primarily due to the action of auxins? 

the detection of photoperiod 
cell elongation
fruit development 
leaf abscission 

7.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Experiments on the positive phototropic response of plants indicate that 

auxin can move to the shady side of the stem. 
auxin is synthesized in the area where the stem bends. 
auxin moves down the plant apoplastically. 
auxin is only of secondary importance in the process.

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