A multicellular organism generally includes a wide variety of cell types. Examples in vertebrates include blood cells, neurons (cells of the nervous system), and the cells that line the digestive tract. What is the role of DNA replication and gene expression in cell differentiation? A. Only the DNA that a cell will use is replicated, and all of the genes that it contains are always expressed. B. Only the DNA that a cell will use is replicated, and gene expression is tightly controlled. C. Nearly all DNA is replicated, and the omissions determine gene expression in the cell. D. All DNA is replicated, but gene expression varies widely among cells and over time.

For each of the following, decide whether the statement describes photosynthesis, cellular respiration, or both. releases energy in the form of atp. stores energy in glucose molecules. performed by producers. performed by consumers.

The graph below compares the rates of reaction of a burning candle and an exploding firework. comparing chemical reactions what can you conclude from the graph? the reaction that causes a firework to explode requires less energy to start, and occurs more rapidly than the reaction that causes a candle to burn. the reaction that causes a firework to explode requires less energy to start, and occurs less rapidly than the reaction that causes a candle to burn. the reaction that causes a firework to explode requires more energy to start, and occurs less rapidly than the reaction that causes a candle to burn. the reaction that causes a firework to explode requires more energy to start, and occurs more rapidly than the reaction that causes a candle to burn. mark this and return

Resperation is a way to release carbon back into the atmosphere