Answer:
Vitamins and minerals boost the immune system, support normal growth and development, and help cells and organs do their jobs. For example, you've probably heard that carrots are good for your eyes. It's true! Carrots are full of substances called carotenoids (pronounced: kuh-RAH-teh-noydz) that your body converts into vitamin A, which helps prevent eye problems.
Vitamin K helps blood to clot, so cuts and scrapes stop bleeding quickly. You'll find vitamin K in green leafy vegetables, broccoli, and soybeans. And to have strong bones, you need to eat foods such as milk, yogurt, and green leafy vegetables, which are rich in the mineral calcium.
Im not sure if thats how it really works but if it did, either it would have to be very minimal to reduce overheating or it's just the bottom few layers of skin keeping the heat in while the muscles contract and retract.
Answer:
Fossil fuels include coal, petroleum, natural gas, oil shales, bitumens, tar sands, and heavy oils.
So oil and petroleum should be it also. :)
Crossing over is the <span>mechanism of genetic variation results from the exchange of gene segments between non-sister chromatids.</span>
B) Viens
The veins have valves to keep the blood pumping out and not coming back in the heart.
