First, he should measure how long it takes for the liquid to become clear if X and Y are mixed together. Then, he should measure how long it takes if he also adds substance A to X and Y. He will find out if substance A is a catalyst. hope this helps :)
The answer is letter B.) Cartilage
Chondrocytes are cells found primarily in the connective tissue, cartilage. The system of cartilage consisting of large amounts of chondrocytes is called the cartilage matrix.
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No doubt, the United States is a powerful country in the world today. It has made its mark in the history by building a strong economy that every other nation envies, and idolizes as well. But, all that glitters is not gold. And every country has its pluses and minuses. There are some serious social issues in the United States as well that need to be dealt with to maintain the position of power and prestige, and set a true example of ideal society in the world.
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A : in respiratory tract
b : digestive tract (stomach,intestine)
c : kidney (nephrone,tubules ) ovary , eye and thyroid
d: endocrine organs . <span>abdominal cavity
</span>e: hair cells of the inner ear, the receptor cellsof the taste buds, and the rods and cones of the <span>retina.</span>
Contraction of muscle tissue happens without the use of energy.
