Animal kingdom classification for class 11. Classification Of Animals 2022-12-25

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The animal kingdom is a diverse and fascinating group of organisms that includes everything from small invertebrates to large mammals. Classification, or the organization of living things into groups based on shared characteristics, is a crucial tool for understanding the animal kingdom and studying the relationships between different species. In this essay, we will explore the classification of animals and how scientists use it to understand the natural world.

One of the earliest and most influential systems of animal classification was proposed by the 18th-century naturalist Carl Linnaeus. His system, known as the Linnaean taxonomy, is based on the idea of grouping organisms by their shared physical and biological characteristics. According to Linnaeus, all animals are classified into one of six major categories, known as taxa: kingdom, phylum, class, order, family, and genus.

The highest level of classification in the animal kingdom is the kingdom, which is divided into two main categories: animals (Animalia) and plants (Plantae). Within the animal kingdom, animals are further divided into smaller groups based on their physical and biological characteristics, such as their body structure, mode of reproduction, and mode of nutrition. For example, animals that have a segmented body, such as worms and insects, belong to the phylum Arthropoda.

The next level of classification is the class, which is further divided into smaller groups based on shared characteristics. For example, the class Mammalia, which includes all mammals, is characterized by the presence of mammary glands and the ability to regulate body temperature. Within the class Mammalia, animals are further divided into smaller groups based on shared characteristics, such as the presence of fur, the number of toes, and the shape of their teeth.

The next level of classification is the order, which is further divided into smaller groups based on shared characteristics. For example, the order Carnivora, which includes all carnivorous mammals, is characterized by the presence of sharp teeth and claws. Within the order Carnivora, animals are further divided into smaller groups based on shared characteristics, such as the shape of their skulls and the number of teeth.

The next level of classification is the family, which is further divided into smaller groups based on shared characteristics. For example, the family Canidae, which includes all dogs, is characterized by the presence of long muzzles and retractable claws. Within the family Canidae, animals are further divided into smaller groups based on shared characteristics, such as the size and shape of their ears.

The final level of classification is the genus, which is further divided into smaller groups based on shared characteristics. For example, the genus Canis, which includes all wolves, is characterized by the presence of long muzzles and bushy tails. Within the genus Canis, animals are further divided into smaller groups based on shared characteristics, such as the size and shape of their ears.

Classification is an essential tool for understanding the animal kingdom and studying the relationships between different species. By organizing animals into groups based on shared characteristics, scientists can better understand the evolution and natural history of different species and how they are related to one another.

Animal Kingdom Classification (Animalia)

animal kingdom classification for class 11

The animals are distinguished from other living things by their possession of eukaryotic cells multicellularity and tissue-level organization. For example, some animals are classified as vertebrates which means they have a backbone while others are classified as invertebrates which means they do not have a backbone. Pseudocoelomate: In pseudocoelomates, mesoderm appears as pouches between the endoderm and ectoderm. Various steps considered to classify a specimen are: i Mode of nutrition — It can be autotrophic, holozoic, saprophytic or parasitic. Distinguish between intracellular and extra-cellular digestion. It involves a sexually immature larval stage 6. They fall under the eucaryotic domain.

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Basis of Classification of Animal Kingdom

animal kingdom classification for class 11

Bilateral symmetry: In bilateral symmetry, only a single plane divides the body into two equal halves, e. Animal Kingdom Class 11 Notes - Chapter 4 The animal kingdom is one of the kingdoms among the Five-Kingdom Scheme of classification proposed by R. Sexes are not separate in these worms. Bilateral symmetry is seen when the body can be divided into two identical halves in only one plane, such as crabs. Such animals have been categorized into the phylum Porifera.

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NCERT Chapter 4: Animal Kingdom Class 11 Notes

animal kingdom classification for class 11

The organization in these organisms is of tissue-level organization. When an animal is referred to by its scientific name, it is referred to by its genus and species. The bodies of Aves are designed to have low air resistance. There is an open circulatory system and respiration is through gills. Osteichthyes The Osteichthyes have bones rather than cartilage, making them a direct contrast to the Chondrichthyes.

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NCERT Solutions For Class 11 Biology Animal Kingdom

animal kingdom classification for class 11

In fact, simply by looking at them, you might not be able to tell them apart! For example, mammals are a class of animals that have fur or hair produce milk for their young, and have a backbone. The process of fertilization is external. An example of bilateral body symmetry is annelids and arthropods. Organisms can be classified according to presence or absence of the coelom. There is a distinct water vascular system which helps in movement, transport of food and respiration.


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Animal Kingdom Revision Notes

animal kingdom classification for class 11

This is often known as the binomial nomenclature. The phyla are further divided into classes and the classes are divided into orders. How important is the presence of air bladder in Pisces? The heart has two chambers and they are cold-blooded. These animals exhibit tissue level of organisation and are classified as coelenterate. Common examples are clams, snails, and mussels. They mostly live in marine water. These organisms are found in many organisms including human beings.


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Classification Of Animals

animal kingdom classification for class 11

Segmentation in the body is first observed in which of the following? The central nervous system present in non-chordates is non-ganglionated, dorsal, hollow, and single. The animal kingdom or Animalia consists of billions of organisms and millions of species. They have gills-like structures to breathe. Seahorse and flying fish are examples. When a plane divides an organism into two identical halves, it is called radial symmetry, such as in Coelenterates.

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Welcome to the Living World: Animal Kingdom

animal kingdom classification for class 11

However, the body is devoid of scales and fins. Coelom The coelom is a key feature for classification. The vast majority of animals are invertebrates with insects being the most abundant type of animal on Earth. Elephants, whales, and humans are only a few examples. The circular system in their body is of circular type. Animal Genus Every animal family is further subdivided into genera, which are tiny groups of animals.

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Classification of Kingdom Animalia

animal kingdom classification for class 11

The animal kingdom has been broadly classified into two, based on the presence or absence of notochord- Non-Chordata and Chordata. As we move on, the complexity of body design amplifies and the division of labour occurs among the tissues. They have tissue level of organization and are diploblastic. Their bodies are filled with pores and they are multicellular. Animals belonging to phyla Annelida, Mollusca, Arthropoda, Echinodermata, Hemichordata and Chordata are examples of coelomates. They can live in both marine and freshwater. Students can prepare the CBSE Class 11 Biology Chapter 4 with the help of our study materials.

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Notes of Ch 4 Animal Kingdom

animal kingdom classification for class 11

What is the difference between direct and indirect development? Phylum — Mollusca The second largest phylum after Arthropoda in the whole animal kingdom is the Mollusca phylum. In urochordata, notochord is present only in tail of larva and disappears in adults, while in cephalochordata, it extends from head to tail region and persists throughout the life. Generally, animals show two types of symmetry- Radial symmetry: A symmetry where any plane passing through the central axis divides the body into two equal halves is called the radial symmetry. Linnaeus initially recognised only two kingdoms: plant and animal. Mostly fishes and ectoparasites belong to this class. Usually, female organisms are longer than male organisms. These Cnidoblasts are used in their defense mechanism and to capture the food.

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