The coldest layer of the atmosphere is the crust because it the only layer that is cooler from the rest. The crust is also the top layer of the earth's layers..
Answer:
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Differential gene expression
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Explanation:
1. Cell specialization occurs due to the differential gene expression, it is the process which is responsible for the production of cells with different traits at different positions and at different time. This process changes cells from simple to more specialized in both structure as well as in function. This is all due to the differential gene expression where all cells beside containing the same gene, express different genes in different cells.
2. Cell differentiation is very important among almost all multicellular organisms. This process results in the formation of a complex organism with different types of tissues and cells from a zygote.
Answer:
You can burn fossil fuels to produce heat energy, and use them to power your engine.
<span>Because DNA contains the genes that instruct the cells in how to build proteins. The genetic codes are the blueprints for each protein, and proteins control all biochemical reactions in the cell (as enzymes) and also form the structure of the cell, which becomes the structure of the entire organism. Without knowing how to build proteins, higher organisms would never have evolved.</span>
D all of the above is the answer