The nucleus of an atom contains the protons and the neutrons.
In humans, DNA and RNA carry out various roles. DNA is responsible for genetic information storage and transmission, while RNA specifically codes for amino acids and serves as a protein-making messenger between DNA and ribosomes.
A. The giant squid
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The importance of natural forest ecosystems to human well-being can not be overstated. Forests provide raw materials for food, fuel, and shelter. In forests, ecosystem components such as micro-organisms, soils, and vegetative cover inter-act to purify air and water, regulate the climate and recycle nutrients and wastes. Without these and many other ecosystem goods and services, life, as we know, would not be possible.
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Accumulation of trace elements, especially heavy metals, in the soil has potential to restrict the soil's function, cause toxicity to plants, and contaminate the food chain.
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