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Cell differentiation and Specialisation, Chromosomes and Mitosis, And Stem…
Cell differentiation and Specialisation, Chromosomes and Mitosis, And Stem cells
Specialised cells
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Root hair cells
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They are on the surface of roots which grow into long hairs that stick out into the soil. This gives the plant a large surface area for absorbing water and mineral Ions
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Nerve cells
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Cells are long, have branched connections at there ends to connect to other nerve cells to create a network throughout the body
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Phloem and Xylem cells
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To form the tubes they are long and joined at end to end. Xylem cells are hollow in the centre, and Phloem cells have very few sub cellular structures so that stuff can flow through them
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Sperm cells
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Has a long tail, streamlined head, mitochondria for energy and enzymes to digest through the egg cell membrane
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Chromosomes
Most cells in the human body contain a nucleus. It contains your genetic material in the form of chromosomes
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They carry a large number of genes. Different genes control the developments of different characteristics like hair colour
Body cells have 2 copies of chromosomes, one from the mother and one from the father.
Differentiation
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Most animal cells lose the ability to differentiate at and early stage, but in plant cells they don't lose the ability to differentiate
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In animals, mature animals use there differentiated cells to repair and replace damaged cells such as skin or blood cells
Some cells are undifferentiated, these are called stem cells
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