<span>It is true that a chromosome is made up of both DNA and proteins which are compacted and condensed.
>> Along with every organism on Earth, each of the things, is composed of Deoxyribonueclic acid or DNA. In this case, you can say that DNA is present in almost all of the living things on Earth.</span>
Human Immunodeficiency Virus -- this is HIV, the virus that causes AIDS.
Flu viruses. There are lots of different strains of flu virus, which is why new vaccines have to be made every year.
Cold virus. The common cold is caused by a virus.
Answer: it is A.
Explanation: because they are both about the birds bones and birds need to fly if they don't have bones they can not fly
The answer is energy, I think