Protons and Neutrons affect the mass. Protons and Electrons change the charge of the atom (positively or negatively charged). Valence electrons are the ones that do fun stuff in chemical reactions, they are responsible for making/breaking bonds, at least to my understanding.
Hope this helps.
The germinal layers that give rise to the digestive system is Ectoderm, Endoderm, Mesoderm, Respectively.
Answer:
rocks
Explanation:
A geologist is a person who studies the rocks and the earth's surface to find different phenomenon. The study of rocks and he fossils found there helps the geologist to understand and conclude the type of climate and the environment it formed the fossils of a place on earth. It provides large amount of information about the climatic conditions of the place when the layer of it was forming.
DNA and RNA are the two types of gene mutations
