Answer:
The Paleozoic involved the appearance of fish, and eventually of life moving onto land. The Mesozoic was dominated by dinosaurs. The Cenozoic started with the extinction of the dinosaurs, and included the development of birds and mammals. ... The Mesozoic Era ended with another extinction.
<span>- genetic drift
</span>Which mechanism affected the gene pool of the immigrants that entered the United States through Ellis Island?
NOT:
- gene flow
- gene mutation
<span>- natural selection</span>
Answer:
The answer is D. Ciliated mucous lining in the nose.
Explanation:
Most inspired particles, such as dust, do not reach the lungs due to the CILIATED MUCOUS LINING OF THE NOSE. The nostril is covered with a mucous membrane that has a mucus-producing epithelium, and has hair cells covered with thin hairs, called vibrating cilia, which displace mucus, immune system cells, and numerous substances capable of blocking bacteria, Viruses and harmful substances. It is the first line of defense of the immune system.
