In individuals with rheumatoid arthritis the body's immune system attacks its own cells. this attack on the cells can result in what symptom? a) discoloration of the skin b) swelling of the joints c) nasal congestion d) excessive weight loss

According to the big bang theory, after the "bang," the universe remained dark until about  300,000 yearsone billion yearsthree minutesthree billion years  later, when neutral atoms began to form.

Now it's your turn to investigate human impact around the world. grab your virtual lab coat and put on your environmental science hat. you will be taking a trip around the globe to explore three locations. at each location, you will investigate the cause and effect relationships of deforestation, desertification, and urbanization. you will also gather evidence of how these factors have impacted the environment over time

The body of water found at number 4 on the map above is the