![]() Cells vary in shape, structure, and size. The cell is the tiniest building unit in an organism’s body and is capable of carrying out all the functions of life. ![]() Some living organisms are unicellular, such as bacteria, Amoeba and Paramecium, while most of them are multicellular, such as humans, whales, and trees. All living organisms have common characteristics, such as feeding, transferring, respiration, excretion, motion, sensation and reproduction.Keep reading for more detailed A-level Biology revision! Summary Which organelles are only present in plant cells?Ĭell structure refers to the various components that make up a cell, including the plasma membrane, cytoplasm, organelles, and genetic material, which work together to maintain the integrity of the cell and carry out essential functions required for life. ![]()
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