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BOTANY - CLASSIFICATION OF PLANTS -flowering and non-flowering plants
About me Name: Aman Srivastava B.tech in Electronics & Communication (I.E.T Lko) Cleared SSC-CGL 2016 pre+mains Follow me on Unacademy Please rate ,review & share
BOTANY BOTANYs the branch of science which deals with the branch of sclence which deals with plants. Plant cell has cell wall made up of cellulose, Plants are autotrophic they have ability to synthesise their own food in the presence of sunlight by process of photosynthesis " PLANT MORPHOLOGY represents the study of the development, form and structure of plants,
CLASSIFICATION OF PLANTS: THALLOPHYTA: those plants which have thallus like body without roots, leaves and stem e.g. algae, fungi, bacteria etc. BRYOPHYTES: have stems and leaves but lack true vascular tissue and reproduce by spore e.g. Mosses, liverworts etc PTERIDOPHYTES: Vascular plants with leaves, stems and roots but lack seeds and flowers e.g. Ferns, Lycopodium These three are non-flowering, spore bearing plants.
Following are two types of flowering plants: GYMNOSPERMS :group of seed producing plants and seed is unprotected by ovary or fruit. e.g. Conifer, Pine Tree ANGIOSPERMS: Major group of flowering plants in which have protected MONOCOTS Have one part. Veins form a parallel pattern Multiple of three. DICOTS SEEDS Have to parts. LEAVES Leaf veins form a net pattern| FLOWERS STEMS EXAMPLE Multiple of five. Bundles are in rings. BEAN SEED Bundles are scattered CORN SEED
Gymnosperm Seeds Angiosperm Seeds and Fruits Cone scalle Inm ature seeds Seeds Frut Seeds Closed cone Tomato Fruit Cone scale Ripened- seeds Seeds Fruit Apple Open cone Chinese lantern
REPRODUCTIVE ORGAN OVULES OVULES DEVELOPED INTO FERTILIZATION PHLOEM GYMNOSPERMS CONES NOT IN OVARY NAKED SEED SIMPLE HAS NO COMPANION CELLS HAS COMPANION CELLS ANGIOSPERMS FLOWERS ENCLOSED IN OVARY SEED INSIDE FRUIT DOUBLE ENDOSPERM HAPLOID TRIPLOID EXAMPLES Conifer, Pine Tree Coconut, Bamboo