Ppt Or Pdf Notes On Diversity And Classification Of Animals
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- Revision Notes for CBSE Class 6 to 12
- The Living World Class 11 Notes PDF Download for Biology
- Prokaryote classification and diversity
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Revision Notes for CBSE Class 6 to 12
Register Now. Hey there! We receieved your request. We all know that there are abundant of living organisms present on the earth.
Many organisms are not identical to each other. Biologist have identified and classified more than 1. Most of these species are found in the tropical regions of the world.
There is a separate branch of Biology called Taxonomy which identifies, names and classifies different organisms present on the earth. Carolus Linnaeus is known as the Father of the Modern Taxonomy.
Classification presented by Aristotle — He classified animals on the basis of their habitats — land, water and air. But it can be easily observed that the animals that live at a particular habitat say land are still so different from each other.
This hierarchical classification was based on the similarities and dissimilarities in the characteristics of the living organisms. If we classify organisms into several categories it will be easier for us to study them. We can also understand how different organisms are related to each other. We can learn why different organisms are found at distinct geographical conditions. Over a course of time the living organisms accumulate changes. These changes could be in their body type or size or their features.
These changes allow them to survive better with the change in environment. This is called Evolution. This concept was introduced by Charles Darwin. Primitive Organisms are the ones that have an ancient or body design. Their bodies haven't undergone many changes with time.
The Advanced Organisms are those who have recently acquired body changes. Species is called as the Basic Unit of Classification. Species is a group of organism which can interbreed with each other. The picture below explains how humans are classified in a hierarchical order. Figure 1 - Hierarchical Order of Classifying Humans. Figure 2 - Five Kingdom Classification.
How scientists came up with the idea of kingdoms? Figure 3 - Classification of Organisms. Eukaryotes — some of them use appendages to move around such as flagella whip-like structure and Cilia hair-like structure. The monera kingdom is further classified as Archaea. These are microbes bacteria that can live in harsh conditions. Since they can live in extreme temperatures they are also called Extremophiles.
These organisms lack a cell wall. Their cell membrane is made up of lipids. They are found in the guts of animals like cow and sheep. They produce methane gas from their dung. Fungi also called as Saprophytes because they grow over the organic material and survive on them. Some species of fungi live in permanent mutually dependent relations with blue-green algae. They are said to have a symbiotic relationship. For Example , Lichens are often found on the bark of the trees.
Figure 9 - Plant Kingdom. Presence of Seeds — whether the seeds are present inside the fruits or not. Cryptogams — These plants do not have well developed reproductive organs. The organs cannot be seen clearly as well and appear as if they are hidden. Example are Thallophyta, Bryophyta and Pteridophyta. Phanerogams — These plants have well developed reproductive organs hence they can produce seeds. They are further classified as the ones which have seeds hidden inside fruits or not - Gymnosperms and Angiosperms.
First terrestrial plants but but need water for sexual reproduction. So called as Amphibian of plant kingdom. Figure 11 - Examples of Bryophyta. Figure 12 - Examples of Pteridophyta. The seed leaves in Angiosperms are called Cotyledons. They turn green on the germination of the seeds.
Angiosperms can be divided into two types on the basis of the presence of cotyledons in them-. Figure 13 - Monocots vs Dicots. Most of the organisms have well-defined organ systems such as Respiratory System , Digestion System and so on. Animals are classified on the basis of differences in their body type and design. The body cavity or coelom in animals contains the organs.
Based on the presence of body cavity animals can be categorized as:. Coelomate — They have true body cavity called Coelom. Pseudocoelomate — It means false cavity. They have a body cavity which is filled with fluid. Figure 15 - Phylum- Porifera. These pores form a Canal system through which water and food circulate in the body and waste is removed. Figure 16 - Phylum- Coelenterata. Some of them live in colonies - They are physically attached to each other such as Corals. Figure 17 - Phylum Platyhelminthes.
Level of Organization — Organs, The cells have three layers — so are called Triploblastic. Figure 18 - Phylum Nematoda. Level of Organization — Organ system level, the cells have three layers so called Triploblastic. Figure 20 - Phylum Arthropoda. Figure 21 - Phylum Mollusca. Level of Organization — Organ systems, The cells have three layers— called Triploblastic. Some of the molluscs have hard external shell like that of Snails and some have internal reduced shell like that in Octopus.
Figure 22 - Phylum Echinodermata. Level of Organization — Organ systems, the cells have three layers —— called Triploblastic. They have a notochord. It is a rod-shaped structure that provides skeletal support to the body. It is found in the embryonic stage of all chordates and in adult stages for some chordates.
Figure 23 - Characteristics of Chordates. Figure 24 - Subphylum Protochordate. Level of Organization — Organ systems, the cells have three layers— called Triploblastic. Figure 25 - Subphylum Vertebrata. Level of Organization — Organ systems, highly developed tissues, the cells have three layers — Upper layer and the inner layer — called Triploblastic.
They maintain a temperature of around 35 — 40 degree Celsius irrespective of the surrounding temperature. They regulate their body heat by metabolic processes and adaptive mechanisms such as hibernation and sweating.
They have scales or plates on their body,a muscular tail, some have skeleton made up of cartilage, some have skeleton made up of bones and cartilage.
They have waterproof skin which is covered with feathers,They have a beak or bill rather than teeth, Their forelimbs are developed into wings, They have hollow bones or pneumatic bones. Figure 26 - Classification of Animalia Kingdom. The whole hierarchy of an organism is not mentioned in the name. Only genus and species of the organisms are mentioned. Concept of Binomial nomenclature was given by Carolus Linnaeus.
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The Living World Class 11 Notes PDF Download for Biology
To ensure the site displays correctly, please use a more modern browser, like Firefox or Google Chrome. Biodiversity is the sum of all the different species of animals, plants, fungi and microbial organisms living on Earth and the variety of habitats in which they live. Scientists estimate that more than 10 million different species inhabit Earth. Biodiversity underlies everything from food production to medical research. Humans use at least 40, species of plants and animals on a daily basis. Many people around the world still depend on wild species for some or all of their food, shelter and clothing. All our domesticated plants and animals came from wildliving ancestral species.
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Register Now. Hey there! We receieved your request. We all know that there are abundant of living organisms present on the earth. Many organisms are not identical to each other.
Prokaryote classification and diversity
Class 6 revision notes cover all the important topics and chapters of all the subjects in simple and easy language. English: A tale of two birds, The shepherd's treasure, Tansen, the monkey and the crocodile. NCERT Class 7 revision notes contain numerous important chapters which are crucial for building the base of future mathematics of the child. If you wish to prepare for the fundamentals readily, you should be ready with Class 7 revision notes. The notes help you prepare each topic in-depth and accurately.
Bacterial Classification, Structure and Function Introduction The purpose of this lecture is to introduce you to terminology used in microbiology. The manual was published subsequent to the Bergey's Manual of Determinative Bacteriology, though the latter is still published as a guide for identifying unknown bacteria. Number of Views
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22 Comments; 61 Likes; Statistics; Notes ANIMALS CLASSIFICATION ACCORDING TO: INVERTEBRATE They haven't got a backbone.
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