NCERT Solutions for Class 11 Biology Chapter 7

Structural Organisation in Animals Class 11

Chapter 7 Structural Organisation in Animals Exercise Solutions

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Exercise : Solutions of Questions on Page Number : 122

Q1 :  

Answer the following:

(i) What is the function of nephridia?

(ii) How many types of nephridia are found in earthworm based on their location?


Answer :

(i) Nephridia are segmentally arranged excretory organs present in earthworms.

(ii) On the basis of their location, three types of nephridia are found in earthworms. They are:

(a) Septal nephridia: These are present on both sides of the inter-segmental septa behind the 15th segment. They open into the intestines.

(b) Integumentary nephridia: These lie attached to the body wall from the third segment to the last segment, which opens on the body surface.

(c) Pharyngeal nephridia: These are present as three paired tufts in fourth, fifth, and sixth segments.

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Q2 :  

Draw a labelled diagram of the reproductive organs of an earthworm.


Answer :

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Q3 :  

Draw a labelled diagram of alimentary canal of a cockroach.


Answer :

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Q4 :  

Distinguish between the following

(a) Prostomium and peristomium

(b) Septal nephridium and pharyngeal nephridium


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Q5 :  

What are the cellular components of blood?


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Q6 :  

What are the following and where do you find them in animal body

(a) Chondriocytes

(b) Axons

(c) Ciliated epithelium


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Q7 :  

Describe various types of epithelial tissues with the help of labelled diagrams.


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Q8 :  

Distinguish between

(a) Simple epithelium and compound epithelium.

(b) Cardiac muscle and striated muscle

(c) Dense regular and dense irregular connective tissues

(d) Adipose and blood tissue

(e) Simple gland and compound gland


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Q9 :  

Mark the odd one in each series:

(a) Areolar tissue; blood; neuron; tendon

(b) RBC; WBC; platelets; cartilage

(c) Exocrine; endocrine; salivary gland; ligament

(d) Maxilla; mandible; labrum; antennae

(e) Protonema; mesothorax; metathorax; coxa


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Q10 :  

Match the terms in column I with those in column II:

Column I

Column II

(a) Compound epithelium

(b) Compound eye

(c) Septal nephridia

(d) Open circulatory system

(e) Typhlosole

(f) Osteocytes

(g) Genitalia

(i) Alimentry canal

(ii) Cockroach

(iii) Skin

(iv) Mosaic vision

(v) Earthworm

(vi) Phallomere

(vii) Bone


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Q11 :  

Mention briefly about the circulatory system of earthworm


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Q12 :  

Draw a neat diagram of digestive system of frog.


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Q13 :  

Mention the function of the following

(a) Ureters in frog

(b) Malpighian tubules

(c) Body wall in earthworm


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<< Previous Chapter 6 : Anatomy of Flowering Plants Next Chapter 8 : Cell : The Unit of Life >>

Biology : CBSE NCERT Exercise Solutions for Class 11th for Structural Organisation in Animals will be available online in PDF book form soon. The solutions are absolutely Free. Soon you will be able to download the solutions.

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