<h2>Two pieces of information </h2>
Sonar is an instrument which is used to search for things which are underwater. It is also used to find the depth of water by giving out ultrasonic vibrations into the water. The time which the vibrations take to return assists to find the distance of the reflecting surface.
Answer:
Healthy eating can help prevent many chronic diseases. These include obesity, heart disease, high blood pressure, and type 2 diabetes. Around half of all Americans have one or more of these illnesses. Healthy eating habits are more likely to stay with you if you learn them as a child.
Explanation:
The answer is D. It <span>keeps outside substances away from the receptor cells</span>
I think genetic variation, but i'm not completely sure
<span>well i take this test before and the correct answer is :A They produce food by photosynthesis</span>
