Answer:
they line the outer surfaces of organs and blood vessels
Explanation:
Dependent selection is one term that you can use for that
Answer:
Atmosphere refers to the thin blanket of air that surrounds the earth.
It serves many important functions such as:
- It contains a mixture of gases that are essential for the existence of life on earth. For example, carbon dioxide is essential for photosynthesis and oxygen is essential for cellular respiration.
- It also serves as the reservoir of water in the form of water vapor. Thus, it forms an important constituent for the water cycle.
- It maintains the temperature of the earth. Through the greenhouse effect, it maintains the temperature of the earth in limited ranges.
- It protects the earth from harmful rays of the sun. For example, ozone inhibits the entry of most of the UV rays of the sun into the earth environment.
Yes!
A tree has plant cells and has a plasma membrane and a cell wall. It also has chloroplasts that contain chlorophyll!
A large depression formed by the collapse of a volcanic cone is called a caldera