In the metric system what does kilo stand for

Identify and describe the three ways that mutations affect organisms.

The chart shows the bid provided by four contractors to complete a job. which contractor is the most cost-effective?

What is the atomic mass of an atom that has 6 protons, 6 neutrons, and 6 electrons? a) 6 b) 8 c) + 1 d) 12 e) 18