Anushree Verma

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Life Processes

on November 02, 2021

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class 10 biology study notes Life processes

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Biodiversity And Conservation

BIODIVERSITY AND CONSERVATION Biodiversity or biological diversity is the occurrence of different types of ecosystems, different species of organisms and their variant like biotypes, ecotypes and gene adapted to different climates and environments of different regions including their interactions and processes .This term was coined by Edward Wilson .The vast array of species of micro-organisms, algae, fungi, plants and animals occurring on the earth either in the terrestrial or aquatic habitats and the ecological complexes of which they are a part comprises biodiversity . Diversity ranges from macromolecules to biomes. The important diversity at the levels of biological organization are- I. Genetic Diversity - a single species might show high diversity at the genetic level over its distributional range. Rauwolfia vomitoria shows genetic variation in terms of concentration and potency of chemical reserpine India has more than 50,000 genetically different strains of rice and 1000 varieti...

Principles of Inheritance and Variation

Genetics is the study of principles and mechanism of heredity and variation. Gregor Johann Mende l is known as ‘ father of Genetics ’. Inheritance is the process by which characters are passed on from parent to progeny. It is the basis of heredity. Variation is the degree by which progeny differ from their parents. Variation may be in terms of morphology, physiology, cytology and behavioristic traits of individual belonging to same species. Variation arise due to 👉 Reshuffling of gene/chromosomes. 👉 Crossing over or recombination. 👉 Mutation and effect of environment. Mendel’s Law of Inheritance : Mendel conducted hybridization experiments on garden pea (Pisum sativum) for seven years and proposed the law of inheritance in living organisms. Selection of pea plant : The main reasons for adopting garden pea (Pisum sativum) for experiments by Mendel were – 👉 Pea has many distinct contrasting characters. 👉 Life span of pea plant is short. 👉 Flowers sho...

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Life Processes

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