Answer:
cell membrane
Explanation:
The cell membrane allows the cell to stay structurally intact in its water-based environment.
The answer is Alpha waves
The heart receives its own supply of blood from the coronary arteries. Two major coronary arteries that branch off from the aorta near the point where the aorta and the left ventricle meet. These arteries and their branches supply all parts of the heart muscle with blood.
Answer:
The population of sage-grouse decreases with the passage of time because of humans.
Explanation:
In the past, long time ago the population of sage-grouse bird were in millions in the Western United States of America and Canada but gradually decrease occurs in population with the passage of time due to the change which occurs in the environment by humans. Destroying the natural habitat for making buildings and for energy development decrease the population of sage-grouse from 16 million to 500,000 during 100 years.