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An Isotope sodium (Na) has a mass number of 22. How many neutrons does it have?

A _________________ is a hypothesis that has been tested many times and continues to be supported.

A carefully planned and executed manipulation of the natural world used to test a prediction in the scientific method is known as an_______________________.

Using a pH meter, you find the pH of an unknown solution to be 8.0. This solution would be described as being:

Which one of the following sequences represents taxa arranged in order from largest, most all-inclusive, to smallest?

A unicellular organism that lacks a nucleus or any other membrane-bound organelle is known as a:

Single-celled organisms reproduce by first duplicating their Deoxyribonucleic acid or DNA.

A molecule of water exists as two atoms that are covalently bonded; therefore, it is considered to have a nonpolar association. 

Prokaryotic cells are larger than Eukaryotic cells, which allow for easy transportation of materials into and out of the cell.

Organisms are very poorly organized structures and do not have any significant complexity.