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The voice of the Genome ­ Chapter 3.1 Animal
cells and asexual reproduction
I can distinguish between Eukaryotic and prokaryotic cells in terms of their structure and ultrastructure:
Living organisms are made up of cells, most of them being familiar cells ­ animals, plants, protoctists and many fungi
have cells…

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nucleus contains at least one nucleolus ­ an extra dense area of almost pure DNA and protein. The nucleolus is
involved in the production of ribosomes, cell growth and division.

Lysosome ­ the function of these organelles are to break down any of the organelles that have been worn out.…

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Simplified table:
Organelle Description (structure) Function



Nucleus A large organelle surrounded by a nuclear Chromatin is made from proteins and DNA.
envelope (double membrane) which contains The pores allow substances (like RNA) to move
many pores. The nucleus contains chromatin and between the nucleus and cytoplasm. The
often a structure…

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The lungs - example of an animal organ, made up of the following tissues
1. Squamous epithelial tissue ­ surrounds the alveoli (gaseous exchange occurrence)
2. Fibrous connective tissue ­ helps force air back out of the lungs when exhaling
3. Blood vessels ­ capillaries surround the alveoli

Organs are…

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Prophase ­ The chromosomes condense, getting shorter and fatter. The centrioles start moving to opposite ends of
the cell, forming a network of protein fibres across it called the spindle. The nuclear envelope breaks down and
chromosomes lie free in the cytoplasm. As mitosis begins, the chromosomes are made of…

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Telophase ­ The chromatids reach the opposite poles on the spindle. They uncoil and become long and thin again.
They're now called chromosomes again. A nuclear envelope forms around each group of chromosomes so now there
are two nuclei and centrioles reform.




Cytokinesis - The cytoplasm divides and there are…

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