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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.
animals with two cellular body wall layers: the ectoderm and endoderm.
the process whereby the products of digestion are transported from the digestive tract into the...
self-feeding; makes its own food by the process of photosynthesis.
(also called lithospheric plates) massive, irregularly shaped slabs of solid rock.
the engulfment of food particles with pseudopodia to form a food vacuole inside the cell. This...