The first step of chemical digestion starts in the mouth. Saliva, the fluid released by the salivary glands in the mouth, contains an enzyme that breakdowns food starch and turns it into simple sugars. This enzyme is called amylase or also known as alpha-amylase or ptyalin.
Here are the 3 parts of the cell theory:
1. Cells are the basic building blocks of any living things.
2. Any living thing is composed of more than 2 cells.
3. New cella arise from the old
Answer:
Four.
Explanation:
Helen Fisher describes romantic love "as a very primitive, basic human emotion as basic as fear, anger or joy". She explained that men and women in prehistoric times who were in love were bound together in preparation for child bearing. But, after four years of raising a child through infancy, the love that once existed begins to wane. The couples tend to break up and search for new partners.
a idk if im right i kinda forgot so its not 100% maybe like 70% its right