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BIT Assignment

BIT Assignment. By CHAN Wai Kay 9th June, 2000. Diversity of Organisms and Classification. Classification of Organisms. Kingdom. Phylum / Division. Class. Species. Species. The smallest group of organisms classified which can interbreed with each other to produce fertile offspring.

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BIT Assignment

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  1. BIT Assignment By CHAN Wai Kay 9th June, 2000

  2. Diversity of Organisms and Classification

  3. Classification of Organisms Kingdom Phylum / Division Class Species

  4. Species • The smallest group of organisms classified which can interbreed with each other to produce fertile offspring

  5. Two Kingdom System • Animals • Plants

  6. Animal Kingdom • Divided into two groups according to the presence or absence of backbone: • Invertebrates : without backbone • Vertebrates : with backbone

  7. Invertebrates

  8. Invertebrates

  9. Invertebrates

  10. Vertebrates • Divided into 5 groups: • Fish • Amphibians • Reptiles • Birds • Mammals

  11. Fish • Aquatic • Cold-blooded • Body covered with slimy and wet scales • Streamline body for easy movement through water • Fins for balance and to control movement • Gills for breathing • External fertilization

  12. Amphibians • Cold-blooded • Scaleless, moist skin • With 4 Limbs • Larvae (tadpoles) use gills for breathing; adults use lungs • External fertilization

  13. Reptiles • Cold-blooded • Body covered with hard, dry scales • Live on land • Breathe with lungs • Internal fertilization; lay shelled eggs

  14. Birds • Warm-blooded • With feathers and wings • Beak for feeding • Lungs for breathing • Internal fertilization; lay shelled eggs

  15. Mammals • Warm-blooded • Hairs on skin • Females have mammary glands for producing milk • Lungs for breathing • Diaphragm present • Internal fertilization; embryos develop inside mothers’ bodies

  16. Summary -- Body Covering of Vertebrate

  17. You may examine the real specimens displayed. Homework Textbook Page 39 HKCEE 1989 5(b) Activities

  18. Plant Kingdom • Can be divided into two groups: • Non-flowering plants • Flowering plants

  19. Non-flowering plants • 5 groups: • Fungi • Algae • Mosses • Ferns • Gymnosperms

  20. Fungus kingdom • Made up of hyphae • No root, stem and leaf • No chlorophyll • Saprophytic or parasitic • Reproduce by forming spores

  21. Algae • Mostly aquatic • May be unicellular or multicellular • No root, stem or leaf • Contain photosynthetic pigments (e.g. chlorophyll) for photosynthesis

  22. Mosses • With simple leaves and stems • No root; with rhizoids for anchorage and absorption of water • Reproduce by spores • No vascular tissues • Found in damp area

  23. Ferns • With true roots, stems, leaves and vascular tissues • Reproduce by spores • Live in damp places

  24. Gymnosperms • With true roots, stems, leaves and vascular tissues • Reproduction by producing seeds • Seeds develop in cones, not enclosed by fruits naked seeds • Needle-shaped leaves to reduce water loss

  25. Angiosperms (Flowering plants) • With true roots, stems, leaves and vascular tissues • With flowers for reproduction • Seeds are produced inside the fruit (matured ovary)

  26. Summary

  27. In Form 6/7, Fungi are grouped into a Kingdom by themselves. They are not considered as plants. In Form 4/5, bacteria are grouped under Fungi. In Form 6/7, bacteria are grouped into a Kingdom by themselves. Remarks

  28. You may examine the real specimens displayed. Homework Textbook Page 37-38, HKCEE 1985 1(a) and HKCEE 1987 1(a) Activities

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