The activity level of the neurotransmitter has been found to be low in people who commit suicide.

This is collection of data made by comparing objects in standard units. in science, the units are metric.

Anonnative species is best described as a species that a. does not normally live in an area b. has no permanent home c. is a poor predator d. increase biodiversity

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