During the Period, great swamps covered North America and parts of Europe. This period got its name because it was the beginning of our great coal deposits. During this Period, the amniotic egg developed and the first true reptiles appeared on Earth along with winged insects.

During the Carboniferous Period, much of the Northern Hemisphere was covered with great swamps that ultimately became great coal deposits.

a. seed plant structure. 1. the three main plant organs are roots, stems, and leaves. a fourth kind of tissue, meristematic tissue, is responsible for plant growth. meristematic tissue is the only plant tissue that produces new cells by mitosis. plants can lose water out of their leaves as they exchange gases with the air

explanation:

b) the inside picture would look at a very high temperature in a very low ph