An excellent food source for the mineral calcium.

legumes

dairy products

sodas

breads

meats

4-six to eight servings are required daily.

fats

carbohydrates

water

vitamins

tea

5-cholesterol comes from which source?

unsaturated fats

incomplete proteins

saturated fats

carbohydrate

The gene that causes sickle-cell disease is present in a higher percentage of residents of sub-saharan africa than among those of african descent living in the united states. even though this gene causes sickle-cell disease, it also provides some protection from malaria, a serious disease that is widespread in sub-saharan africa but absent in the united states. discuss an evolutionary process that could account for the different percentages of the sickle-cell gene among residents of the two regions.

How does pregnancy begin? a) a placenta forms in the uterus b) a sperm reaches an egg in the fallopian tubec) the blastocyst differentiates into two cell types d) contractions begin in the uterine wallapex

Which blood cell spend most of their time in the lymphatic system?