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Living things and Non-living things

In the immediate environment we live, we can easily identify living and non-living things. Very common living things include such microscopic forms as bacteria, amoeba, hydra, spirogyra and chlamydomonas. Larger animals such as snails, various forms of insects, fish, goats, man and trees of various sizes are also included. These living things share some common…

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Major sources and forms of energy

Every living organism requires energy to perform biological processes such as movement, respiration, excretion, coordination, reproduction, active transport across membranes systems, etc. Such energy needs vary from one organism to another, depending however, on their nature. An active animal, e.g the bird will require more energy for flight than a snail will require for crawling.…

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Biology as a science

Biology, the study of living things, is a branch of natural science. The word biology is derived from the Greek words, Bios-Life and Logos-knowledge. The major divisions of biology are botany, the study of biology and living things, plants, and zoology, the study of animals. However, in modern times, other major divisions include microbiology, bacteriology…

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