An atom has a mass number of 15 and an atomic number of 7.  How many electrons does this atom have?

Cells having no nucleus would belong to the

When a positively charged hydrogen in a water molecule become attracted to the negatively charged oxygen in a nearby water molecule, this is called a ionic bond.

Briefly explain what is meant by emerging diseases.

In a dehydration reaction, ________. In order for this to occur water is ________.

The various species of honeycreepers have an assortment of different beak shapes, but all honeycreeper species have a similar size and body shape. This is an example of

Humans store glucose in the form of 

In science, a theory  

List the parts of the scientific method.

Amino acids are needed to build ________, just as ________ are needed to create DNA.