Answer:
Scientists once thought the most fundamental building block of matter was a particle called the atom. Now we know that the atom is made of many smaller pieces, known as subatomic particles. Every atom contains a central core called the nucleus, made of particles called protons and neutrons.
In terms of parasites vs hosts, it is an organism in which the parasite resides and normally feeds + reproduces.
Answer:
The answer is 3. Double Helix.
Chemical bond is the right awnser
