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Module 1: Cells
1.1.3 Cell Division, Cell Diversity and Cellular Organisation
(a) state that mitosis occupies only a small percentage of the cell cycle and that the remaining percentage
includes the copying and checking of genetic information

M = Mitosis The nucleus divides and
chromosomes separate
occupies only a small…

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Module 1: Cells
Cytokinesis The cell splits into two creating two daughter cells that are genetically identical to the
parent cell and each other

Prophase Prepare/Plump
M etaphase M eet/Middle
Anaphase Away/Apart
Telophase Two

Centromere The region of a chromosome where 2 sister chromatids are joined together
Chromatin The DNA…

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Module 1: Cells
Diploid or Haploid? Diploid cells have 2 copies of each Haploid cells have one set of
chromosome in their nuclei chromosomes
Number of Remains the same Reduced by half
chromosomes in
daughter cell
Genetically Genetically identical Not genetically identical

One chromosome in each pair comes from…

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Module 1: Cells
During cell division by meiosis, homologous chromosomes pair up and one member of each pair goes into each
daughter cell . Most eukaryotes have pairs of homologous chromosomes because one is inherited from each
parent . They carry the same genes but may carry different alleles of…

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Module 1: Cells
meristem 3. The ends of the cells break down so that they become continuous , long tubes
) with wide lumen suitable for transporting water and minerals up the plant
Phloem 1. Meristem cells produce cells that elongate and line up endtoend to form a
Sieve Tubes…

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Module 1: Cells
Plant Palisade Contain many chloroplasts (containing chlorophyll) so they can absorb lots of
Cells light for photosynthesis
Cells Thin so gases can easily diffuse

Root Hair Long and thin providing a large surface area for the absorption of water and
Cells mineral ions
Lots of mitochondria to…

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Module 1: Cells

(l) discuss the importance of cooperation between cells, tissues, organs and organ systems
Multicellular organisms work efficiently because they have different cells specialised for different functions. It's
advantageous because each different cell type can carry out its specialised function more effectively than an
unspecialised cell could. Specialised…


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