OUR ENVIRONMENT ANSWER THE FOLLOWING QUESTIONS: EACH QUESTION CARRIES THREE MARKS 1. How is ozone depletion caused? Name the compounds causing i…
Class Mammalia – - Aquatic, t errestrial and aerial. - Mammary glands present for milk production. - Two pairs of limbs. - Skin with hair. - Ear with…
Class Aves – - presence of feather, beak and forelimb in form of wing. - Hind limb adapted to clasping, walking and swimming. - No glands on skin …
Class Reptilia – - Creeping or crawling mode of locomotion. - Skin with scales/scutes. - Tympanum on surface. - Heart three chambered (Four chambered…
Class Amphibia – - Aquatic and terrestrial both. - Two pairs of limbs. - No neck. - Body has head and trunk only. - No external ear, tympanum on su…
PHYLUM HEMICHORDATA 1. Marine 2. Bilateral symmetry, triploblastic, coelomate 3. Body--- i) Proboscis …
Phylum Arthropoda( Jointed Legs) – - Largest phylum. - Bilateral symmetry, Triploblastic, segmented coelomate. - Body - Head, Thorax and Abdomen(thr…
Phylum Annelida – - Aquatic or terrestrial. - Free living or parasitic. - Organ system level body bilateral symmetry and Triploblastic coelomate. -…
Phylum Aschelminthes (Round Worm) – - Free living or parasitic, aquatic and terrestrial. - Bilateral symmetry and Triploblastic. - Pseudocoelomate. -…
Phylum Platehelminthes (Flat worms) – - Body dorsiventrally flattened. - Endoparasite. - Triploblastic, bilateral symmetry. - Acoelomate. - Organ l…
Phylum Ctenophora (sea walnuts or comb jellies) – - Marine, radial symmetry, Diploblastic, tissue grade. - Eight external rows of Comb Plates. - Biol…
Phylum Coelenterata (Cnidaria) – - Aquatic (marine), Sessile or free living. - Presence of Cnidoblasts or Cnidocytes – Stinging cells. - Cnidoblasts…
Phylum Porifera – - Marine. - Multicellular, cellular grade body. - Asymmetrical. - Water canal system for food, respiration and excretion. - Body wa…
Animal K ingdom 1- Symmetry: Distribution of body parts around a hypothetical axis. 2- Ostia: Minute pores on body of sponge. 3- Osculum: Large ou…
Plant life cycle and alternation of Generation – - Alternate stages of haploid (n) and Diploid (2n) phase in life cycle of plants. - Three Patterns …
ANGIOSPERMS - Group of plants having covered seeds in fruits. - Produce flowers having reproductive organs. - Most evolved plants. - Large no. of…
GYMNOSPERMS - Medium sized trees and shrubs. - Main plant body Sporophyte. - In some members roots may have fungal association called Mycorrhiza . -…
Pteridophyte : - Group of first terrestrial plants having vascular tissue viz. Xylem & Phloem. - True stem, root & leaf. - Found on damp, s…
Bryophytes ( Amphibian s of plant Kingdom) – - Group of autotrophic plants with t hallus h aving true roots, stem and leaves with multi cellular se…
Algae – - Group of chloroph y ll o us, simple, thalloid plants. - Largely aquatic, grow on soil, stone, wood etc or symbiotic. - Unicellular to lar…