ANIMAL KINGDOM
1. Levels of Organisation All members of animalia are multicellular but all of them do not exhibit the same pattern of organisation of cells. 2. A complete digestive system has two openings, mouth and anus. ●Platyhelminthes has only a single opening to the outside of the body that serves as […]
BIOLOGICAL CLASSIFICATION
1. ARISTOTLE: ●First scientific approach to classify the organisms ● Used simple morphological characters ● Classify the plant into herb, shrub & tree. ● Classified animals on the basis of presence / absence of Red blood 2. LINNEAUS: ● TWO KINGDOM CLASSIFICATION –>Plantae and Animalia. ● This system did not clear the position of unicellular/multicellular, prokaryotic/eukaryotic organisms. […]
BIODIVERSITY
BIODIVERSITY Sum total of diversity that exists at all levels of biological organisation. o Levels of biodiversity –> Genetic, Species and Ecosystem levels 2. GENETIC DIVERSITY: o A single species might show high diversity at the genetic level over its distributional range. o India has more than 50,000 genetically different strains of rice, and 1,000 […]
HUMAN REPRODUCTION
1. Human reproduces ➤SEXUALLY & VIVIPAROUS 2. Puberty is the time in life when a boy or girl becomes sexually mature. It is a process that usually happens between ages 10 and 14 for girls and ages 12 and 16 for boys. It causes physical changes, and affects boys and girls differently. 3. The REPRODUCTIVE […]
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