Study of Biological Principles

 Cells have particular structures that perform specific jobs. These structures are known as _______.

A scientist performs a series of experiments to confirm an idea regarding cellular metabolism. The results of the experiments support the scientist's initial idea, and after conferring with colleagues, the scientist discovers that evidence from many experiments has supported the idea. This idea could now be considered a(n) :

When a sharp pin gets stuck in your finger, your arm moves quickly away. This is an example of which characteristic of life?
Living things :

A group of tissues working together is _______.

About 12 to 24 hours after the last meal, a person's blood sugar level normally varies from about 60 to 90 milligrams per 100 milliters of blood, though it may attain 130 mg/100 ml after meals high in carbohydrates. That the blood sugar level is maintained within a fairly narrow range in spite of uneven intake of sugar is due to the body's ability to carry out,

What is the nucleus covered in?

What size are cells?

Who was the first to describe cells in 1665 while looking at cork?