Vitamin B12; is a nutrient that helps keep the body's nerve, and blood cells healthy, and helps make DNA, the genetic material in all cells. It also helps to prevent a type of anemia called megaloblastic anemia that makes people tired, and weak.
Function: Sources of new cells, especially red blood cells, healthy nerves and tissues activates folate.
Sources: Animal products, including lean meats, fish, poultry, eggs, cheese, fortified foods.
Toxicity - None known
Deficiency - Pernicious anemia, macrocytic, anemia, nerve damage as indicated by tingling and numbness in the hands and feet.
Hope that helps!!!!! : )
Ans: Gas exchange takes place in the millions of alveoli in the lungs and the capillaries that envelop them. As shown below, inhaled oxygen moves from the alveoli to the blood in the capillaries, and carbon dioxide moves from the blood in the capillaries to the air in the alveoli.
Answer- A mucous
Explanation
This is correct, the alligators eat the birds who eat the small fish. They will decrease with an increase in alligators.
<span>Thymine is harder to make, but more stable. DNA needs to keep information safe for a long time, so it makes sense to use thymine. But RNA is made and used quickly, and small mistakes don’t matter as much, so the easier to make uracil does the job.</span>
