Explanation:
Compact bone is dense and composed of osteons, while spongy bone is less dense and made up of trabeculae. Blood vessels and nerves enter the bone through the nutrient foramina to nourish and innervate bones.
Answer:
One advantage of models is that all the mice are exactly alike except for color, enabling the control of all variables except the one being studied. Models are also easier to work with than live mice. One disadvantage of using models is that they do not have the same smell and behaviors as real mice.
Another advantage is that models can be reused for the experiment for a longer period of time with less maintenance.
Answer:
A. Enzymes
Explanation:
Metabolic processes that occur in living cells occur with the aid of certain biological catalysts that acts as regulators. These biological catalysts are called ENZYMES. Enzymes are proteinous molecules that control the rate at which certain biochemical reactions occur in living cells.
Breaking down of proteins in cells is an example of metabolic, specifically catabolic, reaction. It occurs with the aid of enzymes called PROTEASES that catalyze the reaction. Protease enzyme helps regulate the breakdown of proteins by binding to them.
