Answer: B
Explanation: Plastic shopping bags don’t help the environment, meaning that its not an effort to help preserve the environment.
Lisbon Portugal has had one of the worst
Carbon dioxide is an example of a Greenhouse gas transported by the cardiovascular system to excretory organs and tissues
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
