Microscope changed the course of scientific research by enabling scientist to see things and organism that can not be seen by our bare eyes
For preventing stds use a condom birth control or abstinence
<span>The lungs are the respiratory structure that controls breathing. They make up a substantial part of the respiratory system, along with the trachea, the ribs, the intercostal muscles and the diaphragm. Each lung contains small tubes called bronchioles which end in air sacs called alveoli.</span>
A woman who is a carrier of hemophilia marries a man affected with hemophilia. what percentage of their sons and daughters is expected to have hemophilia?
- 50% of sons and 50% of daughters
