Animal Kingdom class 11 Handwritten Notes Biology

 Animal Kingdom class 11 Handwritten Notes Biology For NEET & CBSE Students 

Download CBSE  & NEET class 11th revision notes for Chapter 4 Animal Kingdom class 11 Notes Biology in PDF format for free. Download revision notes for Animal Kingdom class 11 Notes Biology and score high in exams. These are the Animal Kingdom class 11 Notes Biology prepared by team of expert teachers. The revision notes help you revise the whole chapter in minutes. Revising notes in exam days is on of the best tips recommended by teachers during exam days. 

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Class 11 Biology Chapter 4 is a chapter that enlists the importance of Animal Kingdom. The Animal Kingdom is one the most prominent of the remaining Five-Kingdom Scheme of classification proposed by ecologist R.H. Whittaker. Class 11 Biology Chapter 4 Notes presents about the multicellular eukaryotic organisms- those that lack a cell wall.

NEET Class 11 Chapter 4 Biology Notes provides a comprehensive outline of the chapter Animal Kingdom through solved exercise questions that improvise the preparation process. Students can refer to the Biology Class 11 Chapter 4 Notes PDF curated by experts and enhance the preparation.

Animal Kingdom Class 11 Handwritten Notes

Dissection of Chapter 4 Animal Kingdom

Biology Notes for Class 11 Chapter 4 gives a brief comprehension of eukaryotic, multicellular species belonging to the Kingdom Animalia. The chapter presents the unique characteristics of every animal. The animals enlisted under the Animal Kingdom obtain their energy either by feeding on other animals or by plants. Kingdom Animalia holds millions of identified species. However, a few species share similar characteristics, while others differ drastically.

Class 11 Biology Chapter 4 Animal Kingdom Notes presents a brief on Phylum Porifera, Coelenterata, Ctenophora, Platyhelminthes, Aschelminthes, Annelida, Arthropoda, Mollusca, Echinodermata, Hemichordata and Chordata. 

Basis of Classification

The Animal Kingdom classification is based on the different critical and essential characteristics such as the level of organisation, symmetry, habitat and pattern of organ systems.

Levels of Organisation

There are four levels of organisation:

• Cellular Level of Organisation

• Tissue Level of Organisation

• Organ Level of Organisation

• Organ System Level of Organisation

Levels of Organisation

1. Cellular Level of Organisation

In the Cellular Level of Organisation, the cells are arranged as loose aggregates. An example of a Cellular Level of Organisation is Sponges.

2. Tissue Level of Organisation

In the Tissue Level of Organisation, the cells that perform the same function are arranged into tissues. An example of Tissue Level of Organisation is Coelenterates.

3. Organ Level of Organisation

In the Organ Level of Organisation, the tissues are grouped to form organs. Each organ is specialised for a particular function. An example of an Organ Level of Organisation is Platyhelminthes.

4. Organ System Level of Organisation:

In the Organ System Level of Organisation, the organs associate to form some functional systems like Arthropods, Annelids, Chordates, Echinoderms and Molluscs. An example of an Organ System Level of Organisation is the Circulatory System.

Body Symmetry

There are three levels of Body symmetry:

• Asymmetrical

• Radial symmetry

• Bilateral symmetry

Body symmetry

1. Asymmetrical Body Symmetry

Those organisms falling under the asymmetrical body symmetry cannot be divided into two halves through a median plane. An example of asymmetrical body symmetry is Sponges.

2. Radial Body Symmetry

Those organisms falling under the radial body symmetry can be divided into two identical halves through any plane passing through the central axis. An example of radial body symmetry is coelenterates, echinoderms and ctenophores.

3. Bilateral Body Symmetry

Those organisms falling under the bilateral body symmetry can be divided into two identical left and right halves through only one plane. An example of bilateral body symmetry is annelids and arthropods.

Germ Layers

Based on the germ layers, the animals are classified as follows:

1. Diploblastic

Here, the cells are arranged in two embryonic layers—an external ectoderm and an internal endoderm. Besides, an undifferentiated layer known as mesoglea is present. 

2. Triploblastic

Here, the developing embryo possesses a third germinal layer mesoderm, in between the ectoderm and endoderm. 

Animal Kingdom Handwrittrn Notes Pdf
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