A Plant Is Exposed to a Toxin That Blocks ABA

question 1

Multiple Choice

A plant is exposed to a toxin that blocks ABA receptor sites in the plasma membrane.What is the likely consequence of this exposure?

• A)Oxygen deprivation will trigger the release of ethylene,which will in turn suppress root growth.
• B)Gibberellin production will increase,allowing the plant to access more nutrients in the soil.
• C)ABA will enter the cells by an alternative route and normal function will be restored.
• D)The plant will lose excess water through transpiration and suffer dehydration.
• E)The guard cells will become flaccid and gas exchange will cease.

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