NCERT Solutions for Class 9 Science Chapter 7: Diversity In Living Organisms

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The NCERT Solutions for Class 9 Science have been provided in this article. Class 9 Science Chapter 7 Diversity In Living Organisms covers the folloiwng important topics:

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NCERT Solutions for Class 9 Science Chapter 7

NCERT Solutions

Important Topics for Class 9 Science Chapter 7 Diversity in Living Organisms

Diversity in Living Organisms can be defined as the presence of different organisms within the same ecosystem to lead equilibrium. All the living organisms are made up of many organic and inorganic compounds and each living organism has a different body structure formed by the cells in its body. This gives arise to diversity in the living world and different classes under which different organisms are classified.

Introduction to Taxonomy

Taxonomy is a method of classifying and naming species on basis of their resemblance and contrast. Organism are further grouped as per their domain, kingdom, phylum, class, order, family, genus, and species. These are the major levels of Taxonomy.

Example: What are the types of classification found in Taxonomy?

Solution: The types of classification found in Taxonomy are:

Artificial Categorization System
Natural Categorization System
Phylogenetic System of Classification

Classification of Animal Kingdom

Every species, which has been discovered until today, can be further classified into five kingdoms and one among them is the Kingdom Animalia or simply, Animal Kingdom.

Example: How is Animal Kingdom classified?

Solution: One key mode of classification of animals is considering whether there is a presence or absence of the notochord. Accordingly, Animal Kingdom is split and classified into two major groups:

Chordates
Non-chordates.

Evolution

Evolution is a theory that explains the growth and change in the characteristic properties of a species as it shifts from one generation to another. It includes the change and growth of species including plants, animals, humans and more.

Living Organisms are classified according to their characteristics:

Size
Cellularity
Habitat
Body organization

Also Read:

Chapter Related Links
Protochordata	Platyhelminthes	Coelenterata (Cnidaria)
Mammalia	Classification of Animal Kingdom	Heredity and Evolution
Two Kingdom Classification	Biological Classification	Terrestrial Ecosystem
Animalia Lower Invertebrates	Animal Kingdom Animalia Subphylum	Genus

Read More:

Important Science Study Guides
Difference between in physics	Periodic Table	Difference between in biology
Difference between in chemistry	Named Reactions	Physics Constants

CBSE X Related Questions

1.
Assertion (A): Reflex actions do not involve thinking.
Reason (R): Most reflex actions are controlled by the spinal cord.
- Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).
- Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).
- Assertion (A) is true, but Reason (R) is false.
- Assertion (A) is false, but Reason (R) is true.
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2.
What is the function of diaphragm in human respiratory system ? Where is it present in human body ?
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3.
Due to change in length and area of cross-section of a conductor, resistance of conductor changes while resistivity does not change. Why ?
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Which of the plant hormones are responsible for the following processes? Promote cell division Inhibition of growth Detection of light Wilting of leaves
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5.
Briefly mention the steps in double-circulation through human heart.
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6.
(a) Study the given electric circuit in which 2 A electric current is flowing between points X and Y.

(i) Using the battery, key, voltmeter and ammeter in this given electric circuit, redraw a circuit diagram in which 2 \(\Omega\) and 4 \(\Omega\) resistors are connected between X and Y in parallel combination.
(ii) Circuit drawn by you, in which resistors are connected in parallel combination, calculate the electric current flowing through 4 \(\Omega\) resistor.
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