Plant Response to Stimuli

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

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

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 

Which plant hormone is heavily involved in cell division and metabolism?

• auxin
• cytokinin
• gibberellin
• ethylene

Which hormone promotes seed germination?

• abscisic acid
• ethylene
• gibberellin
• auxin

The fruit ripening cycle of ethylene is an example of a __ feedback cycle.

• positive
• negative

Growth of a plant in response to an external stimulus, such as light

• hormone
• tropism
• phototropism
• stimulus

chemical that causes cells to react in a certain way

• stimulus
• photosynthesis
• stomata
• hormone

anything that causes a reaction or change in an organism

• hormone
• carbon dioxide
• stimulus
• chlorophyl

Tags

NGSS.MS-LS2-1

If a plant gets light from only one direction the shoots will.....

• grow straight up
• grow down
• grow toward the light source
• grow faster

Tags

NGSS.MS-LS2-1