Biodiversity – Explained With Video and pictures. CBSE Class 9 grade Standard Science Biodiversity with Video, learn by reading and watching Biodiversity, Biodiversity for class XIth, Easy to understand Biodiversity, Class 9 standard video, a way to learn Biodiversity, learn from the best, Biodiversity explained with pictures and video. Study material and reading material for Biodiversity SiteMap

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Science 9th Standard Topics

Unit-1 Food
organic farming
Plant and animal breeding
Plants protection from pests and diseases
use of fertilizers manures


Unit-2 Matter Nature and Behaviour
Structure of atom
Particle nature basic units
Nature of matter
Mole Concept
Isotopes and isobars
Heterogenous and homogenous mixtures
Electrons protons and neutrons
Definition of matter solid liquid and gas
characteristics of matter
change of state of matter
Atomic and molecular masses


Unit-3 Organization in the living world.
Pulse polio programmes
Principles of treatment and prevention
Major groups of animals
Infectious and Non infectious diseases
Health and diseases
Diversity of plants and animals
Diseases caused by microbes
Cell Basic Unit of life
Biological Diversity
Unit-3-Organization-in-the-living-world




Biodiversity


Biodiversity is the degree of variation of life forms within a given species, ecosystem, biome, or an entire planet. Biodiversity is a measure of the health of ecosystems. Biodiversity is in part a function of climate. In terrestrial habitats, tropical regions are typically rich whereas polar regions support fewer species.
Rapid environmental changes typically cause mass extinctions. One estimate is that less than 1% of the species that have existed on Earth are extant.
Since life began on Earth, five major mass extinctions and several minor events have led to large and sudden drops in biodiversity. The Phanerozoic eon (the last 540 million years) marked a rapid growth in biodiversity via the Cambrian explosion—a period during which nearly every phylum of multicellular organisms first appeared. The next 400 million years included repeated, massive biodiversity losses classified as mass extinction events. In the Carboniferous, rainforest collapse led to a great loss of plant and animal life. The Permian–Triassic extinction event, 251 million years ago, was the worst; vertebrate recovery took 30 million years. The most recent, the Cretaceous–Tertiary extinction event, occurred 65 million years ago, and has often attracted more attention than others because it resulted in the extinction of the dinosaurs.
The period since the emergence of humans has displayed an ongoing biodiversity reduction and an accompanying loss of genetic diversity. Named the Holocene extinction, the reduction is caused primarily by human impacts, particularly habitat destruction. Conversely, biodiversity impacts human health in a number of ways, both positively and negatively.

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Biodiversity – Explained With Video and pictures. CBSE Class 9 grade Standard Science Biodiversity with Video, learn by reading and watching Biodiversity, Biodiversity for class XIth, Easy to understand Biodiversity, Class 9 standard video, a way to learn Biodiversity, learn from the best, Biodiversity explained with pictures and video. Study material and reading material for Biodiversity