To help students retrieve the right solutions for all the questions given in CBSE Class 11 Biology NCERT book we have collated detailed and accurate answers here at jagranjosh.com. Explained by subject matter experts, all these solutions will help students learn the right technique to write perfect answers in the annual exams to get high scores.
In this article we are providing the NCERT solutions for Class 11 Biology chapter 4, Animal Kingdom. Our subject experts have reviewed these NCERT solutions to provide you the error free content which will make it easy for you to prepare easily and effectively for the annual exams.
All the class 11 Biology NCERT solutions are available in PDF format which students may easily download free of cost.
Some of the questions and their solutions from NCERT Solutions for Class 11: Animal Kingdom, are as follows:
Q. What are the difficulties that you would face in classification of animals, if common fundamental features are not taken into account?
Ans. If common fundamental characteristics are not considered while classifying the animals, then segregating the animals in different groups will be a tuff task as in this case each organism will be placed in a separate group and the entire objective of classification would not be achieved. Classification of animals helps us in comparing different organisms and judging their individual evolutionary significance. So, the whole purpose of classification of animals cannot be achieved by merely considering a single characteristic of animals.
Q. If you are given a specimen, what are the steps that you would follow to classify it?
Ans. If I am given an animal specimen, then I will classify it on the basis of certain common fundamental features by following the steps given below:
(i) In the first step look for the presence or absence of vertebral column.
(ii) In the second step identify the level of organization.
(iii) In the third step look for the body symmetry, i.e., if the animal body is radial or bilateral or asymmetrical.
(iv) Final step is to look for the presence or absence of body cavity.
Q. What is the difference between direct and indirect development?
Ans. Differences between direct and indirect development:
(i) Direct development: When the life cycle of an adult individual lacks any larval stage in its life cycle, then it is termed as direct development. In this case the adults give rise to young ones which directly develop into the adult, e.g., mammals.
(ii) Indirect development: In this type of development, the adult individual gives rise to eggs which develop into the adult after passing through several larval stages, e.g., echinoderms, cockroaches etc.
Q. What are the peculiar features that you find in parasitic Platyhelminthes?
Ans. The characteristic features of parasitic Platyhelminthes are:
(i) These are free living, parasitic forms.
(ii) They do not possess any special organs for respiration. Respiration is anaerobic.
(iii) They have specialised organs like hooks and suckers, for attachment to the host.
(iv) Specialised cells called flame cells are present for excretion.
Get the complete the NCERT solutions for Class 11: Animal Kingdom, from the following link:
Students may download the NCERT solutions for Class 11 Biology chapter- Animal Kingdom, in the form of PDF.
Class 11 Biology NCERT Chapter: Animal Kingdom
NCERT books are considered to be the best source to gain a thorough understanding of the concepts explained in a subject. Before solving the questions given in a chapter of NCERT book, students should familiarize with the various topics and concepts explained in that chapter. Here, we are providing the CBSE Class 11 Biology NCERT chapter- Animal Kingdom. Students are advised to thoroughly read this chapter to grasp all the concepts as this will help you understand the problem discussed in a question and then come with an appropriate answer.
Main topics discussed in Class 11 Biology chapter: Animal Kingdom are:
- Basis of Classification
- Levels of Organisation
- Diploblastic and Triploblastic Organisation
- Classification of Animals
- Phylum – Porifera
- Phylum – Coelenterata (Cnidaria)
- Phylum – Ctenophora
- Phylum – Platyhelminthes
- Phylum – Aschelminthes
- Phylum – Annelida
- Phylum – Arthropoda
- Phylum – Mollusca
- Phylum – Echinodermata
- Phylum – Hemichordata
- Phylum – Chordata.
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