pH sands for and is measure of how many exist in a solution. A neutral solution has a pH of . We can determine pH using indicators such as . and litmus paper.

Hemoglobin is a proton that carries oxygen around your body what is hemoglobin made from

The basic types of tissue in the human body are

If you want to double a batch of brownies you must have double the ingredients before you start cooking similarity a cell must double its contents including its dna prior to dividing