Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download BIT Assignment
Document related concepts
Taxonomy (biology) wikipedia , lookup
Developmental biology wikipedia , lookup
Photosynthesis wikipedia , lookup
Coevolution wikipedia , lookup
Plant use of endophytic fungi in defense wikipedia , lookup
Ornamental bulbous plant wikipedia , lookup
Plant evolutionary developmental biology wikipedia , lookup
Triclocarban wikipedia , lookup
Living things in culture wikipedia , lookup
Evolutionary history of life wikipedia , lookup
Transcript
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 Two Kingdom System • Animals • Plants Animal Kingdom • Divided into two groups according to the presence or absence of backbone: – Invertebrates : without backbone – Vertebrates : with backbone Invertebrates Invertebrates Invertebrates Vertebrates • Divided into 5 groups: – – – – – Fish Amphibians Reptiles Birds Mammals 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 Amphibians • • • • Cold-blooded Scaleless, moist skin With 4 Limbs Larvae (tadpoles) use gills for breathing; adults use lungs • External fertilization Reptiles • Cold-blooded • Body covered with hard, dry scales • Live on land • Breathe with lungs • Internal fertilization; lay shelled eggs Birds • Warm-blooded • With feathers and wings • Beak for feeding • Lungs for breathing • Internal fertilization; lay shelled eggs 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 Summary -- Body Covering of Vertebrate Fish Moist scale Amphibians Naked moist skin Reptiles Dry scale Birds Feather Mammals Hair Activities • You may examine the real specimens displayed. • Homework – Textbook Page 39 HKCEE 1989 5(b) Plant Kingdom • Can be divided into two groups: – Non-flowering plants – Flowering plants Non-flowering plants • 5 groups: – – – – – Fungi Algae Mosses Ferns Gymnosperms Fungus kingdom • Made up of hyphae • No root, stem and leaf • No chlorophyll – Saprophytic or parasitic • Reproduce by forming spores Algae • Mostly aquatic • May be unicellular or multicellular • No root, stem or leaf • Contain photosynthetic pigments (e.g. chlorophyll) for photosynthesis 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 Ferns • With true roots, stems, leaves and vascular tissues • Reproduce by spores • Live in damp places 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 Angiosperms (Flowering plants) • With true roots, stems, leaves and vascular tissues • With flowers for reproduction • Seeds are produced inside the fruit (matured ovary) Summary Chloroplyll Fungi X True root, stem & leaf X Algae X X X Mosses X X X Ferns X X Gymnosperm X Flowering plants Seed Flower X X Remarks • 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. Activities • You may examine the real specimens displayed. • Homework – Textbook Page 37-38, HKCEE 1985 1(a) and HKCEE 1987 1(a)
