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Reproduction S1 Science Revision The Course This course is made up of three sections: Cells – the structure of plant and animal cells Human reproduction Plant reproduction The test will cover all three sections. Part 1: Cells You’ll have to know: The parts of an animal cell The parts of a plant cell The function of each part You should be able to: The animal cell Nucleus Cell Membrane Cytoplasm The plant cell Nucleus Chloroplast Cytoplasm Cell Membrane Vacuole Cell Wall Functions of the cell parts Cell part Function Cell wall Maintains shape of cell Cell membrane Allows substances to enter and leave the cell. Vacuole Contains cell sap and water Nucleus Controls what happens in the cell. Cytoplasm Chloroplasts Is the site of cell reactions Contains green chlorophyll for making food Groups of cells Groups of cells that do the same job su are called _t _i s_ _ _e _s _ Take five minutes to do the revision exercise on cells. If you’ve done it already, learn the parts and their functions! Human Reproduction You’ll have to know: How to label the parts of the male and female reproductive organs What the different parts do in these systems What happens at fertilisation How to label parts of the foetus and the uterus during pregnancy What the different parts do. Human Reproduction continued You should be able to and The female reproductive system oviduct Carries the ovum to the uterus ovary Makes the ova vagina Receives sperm from the penis uterus Will contain the growing embryo The male reproductive system sperm tube Carries the sperm to the penis penis Delivers sperm to the vagina testes Creates the sperm Fertilisation Fertilisation occurs in the _o _v _i d_ u _ c_ t_ rm when the s _p _e __ _ and the o __ _ v _u m meet. The fertilised ovum is called a _ _o _t e _. z_ y_ g As it travels to the uterus, it continues to divide until it’s a b _ _a _l _l of _c _e _l _l s_ called an e _ mb _ _ _r y _o _. Pregnancy Uterus wall Contains the embryo Placenta Allows food and oxygen to pass to the embryo Umbilical cord Joins the embryo to the placenta Amnion Protects the embryo Human reproduction Take ten minutes to complete the revision exercises in your workbook. If you don’t finish them you can do them at home. Plant reproduction You’ll have to know: How to label the parts of a flower What the functions of the parts are A bit about wind and insect pollination Fertilisation in plants How seeds are dispersed. You should be able to: Parts of a flower stigma petal anther style ovary The functions of the parts Part Function stigma Receives the pollen style Positions the stigma ovary Creates the ovules petal Attracts insects anther Creates the pollen Pollination There are two types of pollination: _ _i n _d _ and _i n _s _e _c _ _. w t Insect pollinated plants have _ _ _t _ b _r _i g_ h l y_ coloured petals and a sweet smell. Their stigma is sma _ _ _ _l l_ and the anthers are _i n _s __ i d_ e_ the flower. Wind pollinated plants have small, _u _ _l l_ petals and _f e __ a _t _h _e _r _y d stigmas. They have no scent and the anthers hang o _u _ _t _ __ s _i d e the flower. Fertilisation The male sex cell in plants is the _o _ _l _l e __ p n and the female sex cell is the o _v _u _ _l e _. When the pollen lands on the stigma it forms a p _o _ _l _ l e_ _n _t u_ _b _e to take the pollen to the ovary. The fertilised ovule or z _y __ _ g _o _t e becomes the s _e _e _d _. The ovary becomes a _f _ _ _i t_. ru Seed dispersal Seed Dispersed by? Why? Animals (internal) Fruit is eaten by animals. Animals (external) Hooks catch onto fur. Wind. Seed catches the wind.