Exam revision notes for grade 11 biology. Units covered: microscopy, classification, plant & animal kingdoms, ecosystems, cycles, relationships/symbiosis and environmental change

BIOLOGY NOTES TERM 1 2003 MICROSCOPY Ocular - lens used for magnification (usually x10) Objectives - lenses used for magnification Lower powerx4 Medium powerx10 High powerx40 Course adjustment - focuses image, moves focus quickly Fine adjustment - focuses image, moves focus slowly Stage - specimens are placed here Condenser - focuses light Iris diaphragm - controls amount of light passing through the specimen TOTAL MAGNIFICATION = OCULAR MAGNIFICATION X OBJECTIVE MAGNIFICATION CLASSIFICATION Taxonomy Kingdom Phylum Class Order Family …showed first 75 words of 1514 total…

…showed last 75 words of 1514 total…Protsita - single celled (have a nucleus) ·Fungi - mushrooms/toadstools etc (do not photosynthesise) ·Plants - contain chlorophyll and photosynthesise ·Animals - multi-cellular life forms that rely on other means for nutrition Humans: Phylum Chordata ·Dorsal nerve chord ·Most advanced body design Subphylum Vertebrata ·Possess a backbone ·Commonly called vertebrates Class Mammalia ·Mammary glands that secrete milk ·4 chambered heart ·Homeothermic Placental Mammals ·Give birth to well developed young ·Unborn young nurtured by a placenta