NCERT Solutions for Class 9 Science Unit 7

Diversity in Living Organisms Class 9

Unit 7 Diversity in Living Organisms Exercise Solutions

Biodiversity: The variety of living beings found in geographical area is called biodiversity of that area. Amazon rainforests is the largest biodiversity hotspot in the world.
Need for Classification: Classification is necessary for easier study of living beings. Without proper classification, it would be impossible to study millions of organisms which exist on this earth.
<< Previous Chapter 6 : Tissues Next Chapter 8 : Motion >>

Question : Solutions of Questions on Page Number : 80

Q1 :  

Why do we classify organisms?


Answer :

There are a wide range of life forms (about 10 million -13 million species) around us. These life forms have existed and evolved on the Earth over millions of years ago. The huge range of these life forms makes it very difficult to study them one by one. Therefore, we look for similarities among them and classify them into different classes to study these different classes as a whole. Thus, classification makes our study easier.

Answer needs Correction? Click Here

Q2 :  

Give three examples of the range of variations that you see in life-forms around you.


Answer :

Examples of range of variations observed in daily life are:

(i) Variety of living organisms in terms of size ranges from microscopic bacteria to tall trees of 100 metres.

(ii) The colour, shape, and size of snakes are completely different from those of lizards.

(iii) The life span of different organisms is also quite varied. For example, a crow lives for only 15 years, whereas a parrot lives for about 140 years.

Answer needs Correction? Click Here

Q3 :  

Which do you think is a more basic characteristic for classifying organisms?

(a) The place where they live.

(b) The kind of cells they are made of. Why?


Answer :

Please Register/Login to get access to all solutions Facebook Login
Q4 :  

What is the primary characteristic on which the first division of organisms is made?


Answer :

Please Register/Login to get access to all solutions Facebook Login
Q5 :  

On what basis are plants and animals put into different categories?


Answer :

Please Register/Login to get access to all solutions Facebook Login
Q6 :  

Which organisms are called primitive and how are they different from the so-called advanced organisms?


Answer :

Please Register/Login to get access to all solutions Facebook Login
Q7 :  

Will advanced organisms be the same as complex organisms? Why?


Answer :

Please Register/Login to get access to all solutions Facebook Login
Q8 :  

What is the criterion for classification of organisms as belonging to kingdom Monera or Protista?


Answer :

Please Register/Login to get access to all solutions Facebook Login
Q9 :  

In which kingdom will you place an organism which is single-celled, eukaryotic and photosynthetic?


Answer :

Please Register/Login to get access to all solutions Facebook Login
Q10 :  

In the hierarchy of classification, which grouping will have the smallest number of organisms with a maximum of characteristics in common and which will have the largest number of organisms?


Answer :

Please Register/Login to get access to all solutions Facebook Login
Q11 :  

Which division among plants has the simplest organisms?


Answer :

Please Register/Login to get access to all solutions Facebook Login
Q12 :  

How are pteridophytes different from the phanerogams?


Answer :

Please Register/Login to get access to all solutions Facebook Login
Q13 :  

How do gymnosperms and angiosperms differ from each other?


Answer :

Please Register/Login to get access to all solutions Facebook Login
Q14 :  

How do poriferan animals differ from coelenterate animals?


Answer :

Please Register/Login to get access to all solutions Facebook Login
Q15 :  

How do annelid animals differ from arthropods?


Answer :

Please Register/Login to get access to all solutions Facebook Login
Q16 :  

What are the differences between amphibians and reptiles?


Answer :

Please Register/Login to get access to all solutions Facebook Login
Q17 :  

What are the differences between animals belonging to the Aves group and those in the mammalia group?


Answer :

Please Register/Login to get access to all solutions Facebook Login
<< Previous Chapter 6 : Tissues Next Chapter 8 : Motion >>

Exercise : Solutions of Questions on Page Number : 97

Q1 :  

What are the advantages of classifying organisms?


Answer :

Please Register/Login to get access to all solutions Facebook Login
Q2 :  

How would you choose between two characteristics to be used for developing a hierarchy in classification?


Answer :

Please Register/Login to get access to all solutions Facebook Login
Q3 :  

Explain the basis for grouping organisms into five kingdoms.


Answer :

Please Register/Login to get access to all solutions Facebook Login
Q4 :  

What are the major divisions in the Plantae? What is the basis for these divisions?


Answer :

Please Register/Login to get access to all solutions Facebook Login
Q5 :  

How are the criteria for deciding divisions in plants different from the criteria for deciding the subgroups among animals?


Answer :

Please Register/Login to get access to all solutions Facebook Login
Q6 :  

Explain how animals in Vertebrata are classified into further subgroups.


Answer :

Please Register/Login to get access to all solutions Facebook Login
<< Previous Chapter 6 : Tissues Next Chapter 8 : Motion >>

Science : CBSE NCERT Exercise Solutions for Class 9th for Diversity in Living Organisms will be available online in PDF book form soon. The solutions are absolutely Free. Soon you will be able to download the solutions.

Popular Articles