n the initial days of pregnancy, a woman often feels no symptoms at all. Women with ectopic pregnancies often experience severe pain in the lower abdomen. They may experience digestive discomfort. Why do these symptoms occur?

and i oop

explanation:

trachea, alveoli, lung capillaries, arteries

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:

oxygen = 21% of the atmosphere

nitrogen = 78%

carbon dioxide = 0.1%

argon =0.934%