The major source of building blocks for building new muscle and tissue are found in foods that contain
a) proteins
b) lipids
c) carbohydrates
d) vitamins

Which best describes red blood cells? a. they are colorless b. they protect against disease-carrying microorganisms c. they transport oxygen throughout the body d. they aid in blood clotting

Animals such as pronghorn antelope, bison ans badgers dot to the landscape. where are these animals located?

What molecules does hemoglobin decay into over time