Which of the Following Is a Disadvantage of Using Bt

question 31

Multiple Choice

Which of the following is a disadvantage of using Bt to control insects?

• A)Bt does not accumulate in the soil or in nontarget animals.
• B)Bt is easily degraded in the natural environment.
• C)The toxin can only be activated in target insects so it is nontoxic to mammals.
• D)Though not well documented it is possible for horizontal gene flow to introduce Bt genes into other plants.

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Definitions:

Lumbar Vein

A vein that drains the posterior abdominal wall and the spinal cord in the lumbar region.

Popliteal Vein

A vein located at the back of the knee that helps drain deoxygenated blood from the lower leg back to the heart.

Foot

The lower extremity of the leg below the ankle, on which a person stands or walks.

Calf Region

The posterior part of the lower leg, made up of the gastrocnemius and soleus muscles.