Answer: C
one grade level because they made up many groups of students
They produce hydrogen gas when reacted with metals
Answer:
The bacteria infected with viruses that had radioactive DNA had become radioactive. The bacteria that had been infected with viruses marked with radioactive proteins were not radioactive.
Explanation:
The rest of the answers:
1.2
2.3
3.2
4.1
5.b
Answer:
because it is also created from the father not only one of them
