Fernandez Sci Key Points (1) PDF

1 Living things carry out seven vital functions to maintain life: Vital functions of living things Detect and react to stimuli 2 There is a wide variety of living things, including various types of animals, plants and microorganisms. 3 The wide variety of living things is called biodiversity....

1 Living things carry out seven vital functions to maintain life: Vital functions of living things Detect and react to stimuli 2 There is a wide variety of living things, including various types of animals, plants and microorganisms. 3 The wide variety of living things is called biodiversity. 4 Living things vary in shape and structure. They also vary greatly in size. ——————————— TEEm I S UW_—_—_——————_ W R 1 Classification helps scientists identify living things and study large numbers of living things in an orderly way. 2 Scientists classify living things according to their similarities in key features. 3 Animals can be classified into vertebrates and invertebrates according to whether they have a backbone. 4 The table below shows the general features of the five groups of vertebrates. Groups of vertebrates Reptiles Amphibians Fish Birds Habitat Water Young forms: water Adults: land Water or land | Land Outer Slimy scales Moist skin, no scales Dry, hard covering Land Fur or hair Feathers | scales | | i _ Mammals Organ for breathing Gills Young forms: gills Adults: lungs and skin Lungs Structures for movement P3IE Four limbs Four limbs Two wings | Four limbs and two other limbs - 4 Body temperature Changes with | Changes with environment | environment Reproduction QRENATS& — e B - Lay shelled eggs 1‘ Keeps constant Changes with | Keeps environment | constant Lay shelled eges Lay eggs Lungs . Lungs | Give birth to live young ”__l‘—'—'__—_i Beak Others 5 | glands | Plants can be classified as follows: have vascular tissues Ji% no vascular tissues Non-vascular plants Vascular plants produce seeds do not produce seeds Seedless plants Seed plants do not produce flowers Non-flowering plants 6 Mammary praoduce flowers Flowering plants ts. ita hab ir the to pt ada em th p hel t tha es tur fea dy bo l cia Living things have spe Biodiversity is important to maintain balances in natural e environment so that it can be more sustainable. e Biodiversity benefits humans by providing resources, such as food, raw materials and medicines. d lea d an gs in th ng vi li of al iv rv su the en Some human activities threat to a rapid reduction in biodiversity. These activities include: e destruction of natural habitats e overhunting and overexploitation of natural resources e introduction of foreign species e pollution - W -+« 2 Roles of individuals in conservation As citizens, what can we do to help conserve wildlife and the natural environment? Below are some tips. .« « ) Do not feed, disturb or collect wild animals and plants @ Do not leave litter in the countryside Do not feed wild monkeys © Do not eat food or buy products made from endangered species @ Use resources that are obtained in asustainableway................)3 A pack of fish obtained in a sustainable way ' = | .. @) Take part in conservation programmes such as beach clean-up and tree planting events @ Practise the 4 Rs principle in daily life to Volunteers cleaning up a beach reduce pollution A Learn about the 4 Rs principle in Activity 3.4 Reduce: reduce the use of resources o - Reuse: reuse resources rather than throwing them away Replace: replace environmentally harmful materials with less harmful ones - Recycle: recycle materials to make new products 1 Biodiversity is important to maintain balances in natural environment so that it can be more sustainable. 2 Biodiversity benefits humans by providing resources, such as food, raw materials and medicines. 3 Living things in danger of extinction are called endangered species. 4 Some human activities threaten the survival of living things and lead to a rapid reduction in biodiversity. These activities include: 5 e destruction of natural habitats e overhunting and overexploitation of natural resources e introduction of foreign species ¢ pollution Conservation is necessary to maintain biodiversity. Living things exist in a wide carry out include . microorganisms plants animals classified into invertebrates variety called reducing rapidly due to classified into vertebrates huma.n activities non-vascular , needs plants. conservation classified into classified into \_J\__;——’ classified into non-flowering plants flowering plants