Aresearcher is interested in finding out if the amount of amylase varies from person to person what would be the best way to test this

I think it would be throught Saliva testing

Explanation:

In a person saliva the amylase can be detected.

Take consistent amounts of saliva samples from a number of people who have not eaten in 8 hours and measure the quantity of amylase in each sample.

Explanation:

good one: produce hormones that plants grow.

bad one: the problem with organic matter is that while plant nutrients are needed for crop growth, they can also stimulate excessive growth of the wrong plants – mainly, algae.

is this a psat question, if so do not cheat try your best.