NCERT Books for Class 9 Science Chapter 7

Chapter 7:

NCERT Books for Class 9 Science - Diversity in Living Organisms - Free PDF Download

Free NCERT Books download for Class 9 Science Chapter 7 - Diversity in Living Organisms on Vedantu.com. Students can also download the NCERT Solutions for Class 9 Science Chapter 7 Diversity in Living Organisms in PDF for Class 9 Science Chapter 7 - Diversity in Living Organisms. Register for Science tuition to clear your doubts and score more in your exams.

As you might already know, there are millions of species coexisting on mother earth, and it is near to impossible to learn about each species one by one. Hence we classify organisms on some specific similar characteristics to different classes, so we can study them as a whole.

The shape, form and way of living of each organism differ a little, hence the organisms can be classified on the basis of these similarities. These classifications of organisms aid in the study of evolutionary links and also in finding the missing evolutionary links.

The Five Kingdom Classification of Living Beings Mentioned in the Chapter 7 - Diversity in Living Organisms

In 1969, Robert Whittaker first proposed the “Five Kingdom Classification” of all the living beings living on the earth. These five kingdoms are -

Monera: It includes prokaryotic cells without a nucleus and cell membranes. For example: Bacteria, Green-Blue Algae, and mycoplasma.
Protista: These include the simplest forms of eukaryotes cells, which are unicellular. Protozoans and diatoms are all examples of it.
Fungi: Fungi are multicellular eukaryotic organisms. They used chitin to make their cell walls. They live on decaying and dead organisms and hence are called saprophytes. For example: Mushrooms and rhizopus are the examples of Fungi
Plantae: Non-motile, multicellular eukaryotes creatures with cell walls based on cellulose are included in this category. Most of the organisms of Plantae kingdom are capable of Photosynthesis and are pretty complex. Plants and tree will be their prime example
Animalia: All the multicellular eukaryotes and motile organisms with very thin or no cell walls at all are included in this kingdom. Humans are also part of this group.

FAQs on NCERT Books for Class 9 Science Chapter 7

1. How the Animalia kingdom is subdivided in chapter 7 - Diversity in Organisms?

The Animalia kingdom is the biggest kingdom and is further divided into many groups. But majorly it is divided in two sub categories based on the presence of vertebrates or not in the organism. Invertebrata and Vertebrata are these two sub categories. The student can learn more about all these classification from the NCERT book class 9 science chapter 7. To help the student to better understand the topics at hand, We at Vedantu provides the student with a lot of free study materials.

2. Who are reptiles and aves in the Vertebrate category of Animalia Kingdom?

The Vertebrate category of animalia kingdom is divided into 5 classes: reptiles and Aves are one of those categories.

Reptiles: Reptiles are cold-blooded animals with a three chambered heart except the Crocodile. They breathe majorly via their lungs and almost all the reptiles lay eggs. Snakes, Crocodiles and turtle are its primary examples
Aves: All the birds are included in this category, they are warm-blooded in nature. Two of their limbs are converted into wings to support their flight. Their bones are hollow inside and they have features covered all around the body and are very light weight creatures. All so, they can fly in the sky.

3. Explain the difference between Vertebrata and Invertebrata? and also list the subcategories of them as mentioned in chapter 7?

The animal kingdom is divided into two categories which are Invertebrate and Vertebrata.

Invertebrata: This category includes organisms of the Animalia kingdom which lack a vertebral column. Most of these are sea creatures. This category is further divided into many different sub-categories, these subcategories are Porifera, Coelenterata, Platyhelminthes, Nematoda, Annelida, Arthropoda, Mollusca, and Echinodermata.
Vertebrata: Vertebrates are the most complex organisms and they have a real vertebral column and well-built endo-skeleton. There are five classes of vertebrates which include Pisces, Amphibia, Reptilia, Aves, and Mammalia. Human beings also belong to this category.

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