Unit Test — Unit test Answers

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1
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Why are scientists concerned about the use of the Bt toxin, which is used to kill insects, in genetic engineering?

A
The Bt toxin is killing too many insects.
B
The Bt toxin stays in the soil for long periods of time.
C
The Bt toxin gene is not readily accepted by plants.
D
The Bt toxin has been known to cause disease in plants.
2
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Which is a potential negative consequence of using genetically engineered medicine?

A
Gene markers that are resistant to antibiotics are used, providing the possibility for humans to have increased antibiotic resistance.
B
Products that are used to genetically engineer medicine are poisonous.
C
Restriction enzymes are used to create the medicine and have been known to cause cancer.
D
Medicine that is created this way is less effective than medicine that is created the traditional way.
4

The results of Thomas Hunt Morgan’s last cross are shown in the Punnett square below. Which of Thomas Hunt Morgan's hypotheses was valid based on these results?

Question illustration
A
White eyes are lethal in female Drosophila.
B
White eyes are lethal in male Drosophila.
C
Female Drosophila with white eyes are homozygous recessive.
D
White eyes are the dominant trait in female Drosophila.
6

The use of DDT as a pesticide is an example of how new technology can have favorable and dangerous long-term outcomes. How does this relate to the use of DNA technology?

A
Only positive outcomes can result from new technology in science.
B
Scientists should conduct long-term studies of DNA technology to determine the consequences.
C
There is no connection because they are different technologies.
D
Scientists should not use new technology; they should use the methods for pest control that are already available.
7

Scientists have genetically engineered potato plants to produce potatoes that contain edible vaccines. Which is a disadvantage of the genetically engineered potatoes?

A
They are easier to transport and store than injectable vaccines (shots).
B
They make it easier to administer edible vaccines.
C
They are more expensive than potatoes without the vaccine.
D
They have nutritional value while potatoes without the vaccine do not.
9

Which is a disadvantage of using genetic engineering?

A
reduced effectiveness of pesticides
B
more pharmaceuticals
C
edible vaccines
D
drought and salinity tolerance

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