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Download cheat sheet biology and more essays title s and all and more Cheat Sheet Biology in PDF only on Docsity! 0 level IGCSE 2022-2023 Nihal Cabr Biology Team (1/3/2023 Classification Dr. Nihal Gabp  Viruses feed and reproduce on the host Some Taxonomists have Viruses couldn't be added to one of the five kingdoms, as they don't show the typical features of living organisms( MRS.GREN) unless they are inside the cells of another living organism, in other words they are parasites that ll ausing harm lo their host suggested thal viruses belong in a sixth kingdom ‘Type of micro Siena T organism YZ Both have Nucleie acid Sree 7 ‘oth have Nucleic aci cuoplan Nucleic acid Dao RNA pe cell wall e with no cellulose cell membrane x Vv 3. Cytoplasm x with enzymes& food molecules but no arganelies. (No mitochoncria) 4flagellun 4 v Which beats to move bacteria 5.plasmid x v Which are small rings of DNA carrying only few genes. G.capsules > v Protect bacteria against ¢} on( extreme dryness) 7-Ribosomes x Vv > ae 4.Slructure( ification topic 1) 2.Way of reproduction reproduction topic 12) 3.Usefuul forms of bacteria used A)to increase soil fertility(mtrogen cycle) B)in Genetic engineering for msulin production Grown in fermentors for many industrial uses. (pectinase, lactase& biological washing powders) 4_dn sewage treatment. 5. harmful forms like choleraé& TH (immunityé disease) 006 Please notice that by the end of the syllabus vou have to memorise 1.Struenure( classification topic 1) 2.Way of reproduction( reproduction lopic 14) 3.Useful forms of fungus A)yeast used in making bread, brewing & wine production 3B) in fermentors jor production of antibiotic as penicillin 4. Harmful form causing diseases (in immunity &disease topic 9 )  _— Animals Plants A)Flowering HK . (nvertebrates B) non flowering Vertebrates Have a back bone No back bone J T I l Mammals Reptiles Amphibians Birds Fish Bod covered with hait/ fur Body covered wiha Have moist skin Have wi Seales Give birth dry scaly skin Lay jelly coated eggs in Beak Gills ‘aed their babies Lay rubbery / water Feathers Fine and tail — a i® leathery shelled eggs Young breath through Lay hard shelled Lay jelly Have lands: ya ails eggs coated eggs white ~ Adult breath through Legs covered with Have.gsternal eat /pinna soales lungs Different types of teeth 2 Heart with 4 chambers Qe —————— Arthropods Myriapods (nvertebrates Allarthropod Crustaceans |. Segmented body 2. Jointed legs Arachnids 3. Exoskeleton [ngects  yy | Myriapods Crustaceans Arachnids Insects Number of pairs of Jointed legs Cephalothorax| Head Abdomen Thorax Number of body parts Abdomen Other Ke | pair of antenna , Chalky exoskeleton No antenna (or 2 pairs of wings feature 2 pairs of antenna Compound eyes