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NCERT Solutions for Class 11 Biology Chapter 7 Structural Organisation In Animal

by aglasem
August 25, 2021
in 11th Class
Reading Time: 1 min read
0
NCERT Solutions

NCERT Solutions Class 11 Biology Chapter 7 Structural Organisation In Animal – Here are all the NCERT solutions for Class 11 Biology Chapter 7. This solution contains questions, answers, images, explanations of the complete chapter 7 titled Structural Organisation In Animal of Biology taught in Class 11. If you are a student of Class 11 who is using NCERT Textbook to study Biology, then you must come across chapter 7 Structural Organisation In Animal. After you have studied lesson, you must be looking for answers of its questions. Here you can get complete NCERT Solutions for Class 11 Biology Chapter 7 Structural Organisation In Animal in one place.

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NCERT Solutions Class 11 Biology Chapter 7 Structural Organisation In Animal

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Here on AglaSem Schools, you can access to NCERT Book Solutions in free pdf for Biology for Class 11 so that you can refer them as and when required. The NCERT Solutions to the questions after every unit of NCERT textbooks aimed at helping students solving difficult questions.

For a better understanding of this chapter, you should also see summary of Chapter 7 Structural Organisation In Animal , Biology, Class 11.

Class 11
Subject Biology
Book Biology
Chapter Number 7
Chapter Name

Structural Organisation In Animal

NCERT Solutions Class 11 Biology chapter 7 Structural Organisation In Animal

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Class 11, Biology chapter 7, Structural Organisation In Animal solutions are given below in PDF format. You can view them online or download PDF file for future use.

Structural Organisation In Animal Download

NCERT Solutions for Class 11 Biology Chapter 7 Structural Organisation in Animals Download

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Question & Answer

Q.1: Answer in one word or one line. 
(i) Give the common name of Periplaneta americana. 
(ii) How many spermatheca are found in earthworm? 
(iii) What is the position of ovaries in the cockroach? 
(iv) How many segments are present in the abdomen of cockroach? 
(v) Where do you find malpighian tubules?

Ans : (i) The common name of Periplaneta americana is the American cockroach. (ii) Four pairs of spermathecae are present in earthworms. They are located between sixth and the ninth segments. They help in receiving and storing the spermatozoa during copulation. (iii) In a cockroach, the pair of ovaries is located between 12th and 13th abdominal segments. (iv) In both sexes, the abdomen of a cockroach consists of ten segments. (v) Malpighian tubules are main excretory organs of cockroaches. They form a part of the alimentary canal.

Q.2: Answer the following: 
(i) What is the function of nephridia? 
(ii) How many types of nephridia are found in earthworm based on their location?

Ans : (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 intersegmental 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.

Q.3: Distinguish between the following 
(a) Prostomium and peristomium 
(b) Septal nephridia and pharyngeal nephridium

Ans : (a) (b)

Q.4: What are the cellular components of blood?

Ans : Components of blood include erythrocytes (RBCs), leucocytes (WBCs), and thrombocytes (platelets). These components form 45% of blood. They are suspended in the remaining fluid portion, called plasma Mammalian erythrocytes are biconcave, coloured cells devoid of a nucleus. They help in transporting respiratory gases. Leukocytes or white blood cells are nucleated cells. They can be divided into two types, granulocytes (neutrophils, eosinophils, and basophils) and agranulocytes (lymphocytes and monocytes). They help fight against various disease-causing germs entering the body. Thrombocytes are cell fragments produced from megakaryocytes of the bone. They play a major role during blood coagulation.

Q.5: What are the following and where do you find them in animal body 
(a) Chondrocytes 
(b) Axons 
(c) Ciliated epithelium

Ans : Chondrocytes: They are cells of cartilages, and are present in small cavities within the matrix secreted by them. Axons:They are long, slender projections of neurons that help in carrying nerve impulses from the neuron body. Axons aggregate in bundles which make up the nerves. Ciliated epithelium: It consists of simple columnar or cuboidal epithelium with cilia on their free surfaces. It is present on the inner surface of the oviducts and bronchioles. It helps in the movement of eggs or mucus in specific directions.

NCERT / CBSE Book for Class 11 Biology

You can download the NCERT Book for Class 11 Biology in PDF format for free. Otherwise you can also buy it easily online.

  • Click here for NCERT Book for Class 11 Biology
  • Click here to buy NCERT Book for Class 11 Biology

All NCERT Solutions Class 11

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You can also check out NCERT Solutions of other classes here. Click on the class number below to go to relevant NCERT Solutions of Class 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12.

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