Answer:
Imagine studying a cell. That cell has billions of things you can learn about. Now imagine 37.2 trillion cells each a little bit different but still similar. Now imagine that multiplied by all the different people there are on earth. Now then include all the other types of living animals.
That's biology
Scientists so far haven’t managed to figure that out .
The correct answer is
B. bases in DNA in the nucleus
A Tendon is a cord of strong, fibrous tissue connecting muscle to bone And is designed to withstand tension.