Class-XII

 ➢   FLOWER ✔       Reproductive unit of the flowering plants. ✔       Atypical bisexual flower consists of 4 different whorls – calyx, corolla, androecium and gynoecium. ✔       Calyx – outermost whorl consists of sepals. ✔       Corolla – composed of petals that are usually brightly colored. ✔       Androecium – represents the male reproductive organ. o   Composed of stamens….

➢  BIODIVERSITY ✔     The combined diversity at all the levels of biological organization. ✔     Popularised by: Edward Wilson ➔  Types of Biodiversity 🙞   Genetic Diversity: High degree of diversity shown by a single species over a distributional range. o   Example-1: Rauwolfia vomitoria – Grows in the Himalayan ranges. Shows variation in the potency and concentration…

➢  INTRODUCTION ✔     An ecosystem can be visualised as a functional unit of nature, where living organisms interact among themselves and also with the surrounding physical environment. ✔     Ecosystem is the interaction of living things among themselves and with their surrounding environment. ✔     There are two basic ecosystems o   Terrestrial ▪    Forest, grassland and desert…

Study notes for the Chapter-13 of Class XII Biology:- “Organisms and Population”. The notes has been developed in an well organised and detailed manner and is based on the NCERT Textbook.