An isotope is an atom of an element that varies in mass number due to variation in the number of:

A. atoms.

B. protons.

C. neutrons.

D. electrons.

Hemophilia is a trait that is inherited, sex-linked and

Which statement describes an advantage of asexual reproduction?

Describe something that will make your cells hypertonic.

What is the basic unit of matter? A. atom B. electron C. cell D. energy

This is the result of uncontrolled cell division. Often caused by mutations. Mutations may be caused by environmental factors such as radiation or chemicals. Example: Tumor in the lung

How does the human heart organization relate to cells? To organ systems?

Why could a diet low in carbohydrates be dangerous?

What is a pathogen free environment

which object would take the most force to hold up in the air? A. a bus B. a chair C. a balloon D. a nail

In a ecological pyramid, what happens to energy, biomass and number of species as you move up? Why?