Arteries are blood carrying vessels which have thick, elastic, muscular walls, have no valves and in which blood flows under high pressure. The make up of arteries is unique to their function of transporting blood under high pressure.
All arteries carry oxygenated blood from the heart to all other parts of the body, with the exception of the pulmonary artery which carries de-oxygenated blood from the heart to the lungs. It is the only artery that transports blood which has not been oxygenated.
Answer:
The decline was attributed to a number of factors including Increased insect resistance, the development of more effective alternative pesticides, public and user concern about negative environmental side effects—and a government ban on DDT use since 1969--all contributed to the decline.
1. Moist air
2. The less dense air, the less oxygen (at least that's what my teacher says)
Answer:
Photosynthesis will be affected or may not occur.
Explanation:
This is because palisade mesophyll are packed cells and have cylindrical shape with chloroplasts. Chloroplast are present here which control chlorophyll and this area specialises in absorbing light energy from the sun efficiently. If it is below spongy mesophyll, it's ability to absorb light energy is affected as there is an hindrance layer, and when chlorophyll couldn't absorb light energy, photosynthesis cannot occur.
