Explanation:
HIV virus is an RNA virus
B water pollution is the answer
The kitchen, because the chloroplast is the site of glucose production. In houses, kitchens are where you make food.
Tadpoles have no legs while frogs do.
frogs can go on land while tadpoles can't.
frogs can breathe on land and in water while tadpoles can only breathe in water.
The aortic valve prevents backward flow of blood into the left ventricle.
