What is an example of cell wall and also a non example

Which best describes how the common cold spreads in the human body? a bacteria burst out of normal cells killing them b viruses replicate inside respiratory cells c bacteria inject dna into normal cells d viruses insert dna into bacteria

If a strand of dna has 35% thymine. what is the percentage of cytosine, adenine, guanine?

Isolated volcanic peaks on the ocean floor are