Answer: b - Chondroblasts within the cartilage divide and secrete new matrix
Explanation: Chondroblasts are derived from two sources; mesenchymal cells within the center of chondrification and chondrogenic cells of the inner cellular layer of the perichondrium (coverings that lie over most cartilage).
At the chondrification centers, the cartilage forming cells (Chondroblasts) begin to secrete the components of extracellular matrix of cartilage. As the amount of matrix increases, the Chondroblasts become separated from each other and they are located in small cavity within the matrix called lacunae.
Concurrently, the cells differentiate into matured cartilage cells called chondrocytes.
The answer is A.It is absorbed by Earth.
When the atmosphere is heated by the solar radiation, it radiates heat back to the Earth's surface increasing the Earth's surface temperature. This is also what causes the greenhouse effect and urban heat island.
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Nutrition is the process by which the body breaks down substances and gets energy from food.
Peaks between the ages of 25 and 35
Answer:
heat transfer in a fluid in which hot fluid rises and cold fluid sinks; setting up a cycle
