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




Diversity of Plants and Animals


1. General Variety of Living Organisms
1.1 Diversity of Organisms and Classification
1.1.1 Diversity of Organism

Living Organisms have to exhibit 7 characteristics of life:

Nutrition - organisms either make food or obtain food to sustain their life.
Respiration - organisms oxidize food to obtain energy.
Excretion - removal of metabolic wastes.
Movement(Locomotion) - organisms move their whole or part of their bodies.
Irritability - organisms detect stimuli and make corresponding response.
Growth - organisms grow by increasing in size and complexity.
Reproduction - organisms produce offsprings similar to themselves.

There are over one million kinds of animals and plants in this planet. We call this wide range of organisms as diversity of organisms.

1.1.2 Methods of Classification

Classification means sorting things into groups. We classify organisms to make recognition and description
easier.
Organisms are divided into groups according to their characteristics. They are grouped step by step in the
following order:

Classification
Kingdom
Phylum
Class
Order
Family
Genus
Species
Example: Man
Animal
Chordata
Mammalia
Primate
Hominidae
Homo
H.sapiens

*scientific names are in italics
The number of kinds of organisms decreases down the spectum until there is only one kind of organism left for the group 'species'.

1.1.3 Plant and Animal

Organisms can be classified into 2 groups: animals and plants.
Animal
Animals Plant
Plants

Here are some major differences between animals and plants:
Animals Plants
Mode of Nutrition Heterotrophic nutrition. They have to obtain food from other organisms. Autotrophic nutrition. They can make their own food by photosynthesis
Movement Fast. Whole body can move from place to place Slow. Only parts of the body can move
Cellular cell wall Absence. Cells bound by cell wall

Classification of animal:

Animals can be classified into animals without backbones(invertebrates) and animals with backbones(vertebrates).

Invertebrates - many classes. No need to remember all.
Vertebrates - 5 classes.
Fishes Fish
Amphibians Amphibian
Reptiles Reptile
Birds Bird
Mammals Mammal

The characteristics of the five classes of vertebrates are as follow:
Classes Fishes Amphibians Reptiles Birds Mammals
Habitat Water Water and land Land
Body covering Wet scales Naked slimy skin Hard dry scales Feathers Hairs
Breathing system Gills Tadpoles-gills
Adults-lung Lungs
Fertilization External fertilization Internal fertilization
Development of embryo Within eggs Within mother's body, born alive
Body temperature Cold-blooded Warm-blooded
Other features Fins for swimming - - Wings and beaks Mammary glands

Classification of plant:

Plants can be classified into flowering and non-flowering plants.

Flowering plants - have flowers for reproduction.
Non-flowering plants - do not have flowers. There are 5 classes of them.
Algae
Fungi Fungi
Mosses
Ferns Ferns
Gymnosperms Gymnosperms

The characteristics of the five kinds of non-flowering plants are as follow:
Groups Algae Fungi Mosses Ferns Gymnosperms
Habitat Water Damp areas Mainly in damp areas Sunny places
Chlorophyll Presence Absence Presence
Roots, stems and leaves Absence Simple Presence
Vascular bundles Absence Presence
Seed/spore Absence Spore Seed

 

1.1.4 Dichotomous Key

Biological keys are methods used to identify organisms. Dichotomous key is one in which each feature has two alternatives at each stage and choosing either one of them will lead to two different stages. The process is repeated until the organism is identified. Below is an example to illustrate the method:




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