Expressed sequence tags (ESTs) are STSs derived from cDNAs (complementary DNAs).
what is ecosystem
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An ecosystem is a geographic area where plants, animals, and other organisms, as well as weather and landscape, work together to form a bubble of life. Ecosystems contain biotic or living, parts, as well as abiotic factors, or nonliving parts. Biotic factors include plants, animals, and other organisms.
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The term happiness is used in the context of mental or emotional states, including positive or pleasant emotions ranging from contentment to intense joy.
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