Before an ozone layer formed to reduce radiation, life existed a. in the air. c. in oceans and underground. b. in trees and plants. d. on land. Please select the best answer from the choices provided A B C D

The atomic nucleus made up from protons (yellow) and neutrons (blue) and held together by nuclear forces. nuclear forces (also known as nuclear interactions or strong forces) are the forces that act between two or more nucleons. they bind protons and neutrons (“nucleons”) into atomic

Answerspecies;

They make up examples of physical properties