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.What are the basic components of a cell?. Which organelles are only present in eukaryotic cells?.
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