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the dramatic increases in crop production around the world from the second half of the twentieth century, as a result of the breeding of high-yield crops, and the wide-scale use of fertilizers and pesticides.
all the chemical reactions involved in maintaining the living state of the cells and the...
two bean-shaped guard cells surrounding a pore in the epidermis of a leaf that allow gases to...
fats that are solid at room temperature and are found in animals. They are thought to be linked...
neurons that transmit nerve impulses away from the central nervous system to the effectors.