They can stretch because there is one fluid present between ligament called synovial fluid!
The two main types are DNA and RNA
If there were an interruption in the carbon cycle, life on Earth as we know it would be in danger of being disrupted. ... Without carbon dioxide, the plants would not do as well, and potentially die, creating a problem for all the animals on the planet, Since they have to breathe oxygen to live.
There are 23 pairs chromosomes in the human cell.
