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bearhunter [10]
3 years ago
6

Polio viruses contain DNA. The viruses in the polio vaccine have DNA in which the base sequence has several differences from the

base sequence in the normal polio virus. Suggest how this makes them unable to reproduce in the human body.
Biology
1 answer:
Radda [10]3 years ago
3 0

Answer:

The polio strains cannot reproduce because they are weakened.

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Contrast potential and kinetic energy. Give an example of potential being changed to kinetic energy.
loris [4]

Answer:

First, the raised hammer has more potential energy since it has the potential to go higher or lower. Second, when you hit the hammer on the table, the stored potential energy is converted to kinetic energy as the hammer is falling. (It's the falling hammer that has kinetic energy)

Explanation:

Another example-When rolling a ball down a ramp the ball at its highest point has potential energy but when it rolls down the ramp it converts to kinetic energy

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Muscle contraction that results in a change in joint angle is called
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