The answer is alveoli.
The bronchi conduct air to the lungs. They branch into secondary bronchi, which further branch into tertiary bronchi. They divide into small bronchioles. Bronchioles divide into terminal bronchioles, they into respiratory bronchioles, and later into alveoli. The alveoli are places where gas exchange occurs.
Answer:
7. B. the variety of species on Earth
8. D. invasive (exotic)
Explanation:
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cell membrane organelle is the one which become flexible due to its arrangement of phospholipids. The cell membrane is primarily composed of phospholipids arranged in a bilayer as well as integral and peripheral membrane protein.The phosphoipids arrangement is used to describe the cell membrane of many animal and plant cells.