Which of the following act as enzymes?
a. proteins
b. amino acids
c. carbohydrates
d. lipids

Analyze the analogy and read the information below it. fish : fin : : bird : wing if you were reading this aloud, you would say, "fish is to fin as bird is to wing." this analogy uses parts of an animal to relate to the whole animal. much like how a fin a fish move, so does a wing a bird move. which analogy also uses parts to relate to the whole? sky : blue : : dirt : brown flower : petal : : tree : leaf car : road : : boat : water food : sandwich : : sport : softball

The different layers of gases that extend form the surface of the earth into space

Which of the following is a characteristic of the coverdell education savings account