Please refer to Structural Organisation in Animals Class 11 Biology Important Questions with answers below. These solved questions for Chapter 7 Structural Organisation in Animals in NCERT Book for Class 11 Biology have been prepared based on the latest syllabus and examination guidelines issued by CBSE, NCERT, and KVS. Students should learn these solved problems properly as these will help them to get better marks in your class tests and examinations. You will also be able to understand how to write answers properly. Revise these questions and answers regularly. We have provided Notes for Class 11 Biology for all chapters in your textbooks.

Important Questions Class 11 Biology Chapter 7 Structural Organisation in Animals

Objective Questions

Question. In earthworms setae are present in all segments except
(a) first and the last segments
(b) first segment and the clitellum
(c) first segment
(d) clitellum and last segments

Question. Cockroaches are brown or black bodied animals that are included in class _______ of phylum _______.
(a) reptilia; annelida
(b) insecta; arthropoda
(c) insecta; annelida
(d) reptilia; arthropoda

Question. In cockroach, the testes are present in
(a) 3, 4, 5 abdominal segments
(b) 4, 5, 6 abdominal segments
(c) 5, 6, 7 abdominal segments
(d) 6, 7, 8 abdominal segments

Question. Phallic organs in cockroach are related to
(a) male excretory system.
(b) male reproductive system.
(c) female excretory system.
(d) female reproductive system.

Question. A frog never drinks water but absorbs it through one of its respiratory organ. Identify the organ.
(a) Skin
(b) Lung
(c) Buccal cavity
(d) None of the above.

Question. The sensory papillae in frogs are associated with
(a) smell
(b) hearing
(c) respiration
(d) touch

Statement Type Questions

Question. Which of the following statement (s) is/are correct ?
(i) Loose connective tissue contains fibroblasts, macrophages and mast cells.
(ii) Adipose tissue is a type of dense connective tissue located mainly beneath the skin.
(iii) Tendons and ligaments are examples of dense irregular connective tissue.
(iv) Cartilage, bones and blood are various types of specialized connective tissue.
(a) Only (i)
(b) Both (ii) and (iv)
(c) Both (i) and (iii)
(d) (i), (iii) and (iv)

Question. Which of the following type of muscle tissue is being described on the basis of given statements ?
(i) These muscle fibres taper at both ends and do not show striations.
(ii) The wall of internal organs such as the blood vessels, stomach and intestine contain this type of muscle tissue.
(iii) They are ‘involuntary’ as their function cannot be directly controlled.
(a) Skeletal muscle
(b) Smooth muscle
(c) Cardiac muscle
(d) All of these

Question. Which of the following statement(s) is/are correct regarding excretory system of cockroach ?
(i) Excretion is performed by malphigian tubules.
(ii) They absorb nitrogenous waste products and convert them into uric acid which is excreted out through hindgut. Hence, this insect called ammonetelic.
(iii) In addition, fat body, nephrocytes and uricose glands also help in excretion.
(a) Only (i)
(b) Both (ii) and (iii)
(c) Both (i) and (iii)
(d) All of these

Question. Read the following statements.
(i) It is a contractile tissue present only in the heart.
(ii) Cell junctions fuse the plasma membranes of these cells and make them stick together.
(iii) Communication juntions at some fusion points allow the cells to contract as a unit, i.e., when one cell
receives a signal to contract, its neighbours are also stimulated to contract.
Which of the following type of tissue is being described by the above statements ?
(a) Skeletal muscle
(b) Cardiac muscle
(c) Smooth muscle
(d) Cartilage

Question. Which of the following statement(s) is/are correct regarding respiratory system of cockroach ? 
(i) It consists of a network of trachea, that open through 12 pairs of small holes called spiracles present on the lateral side of the body.
(ii) Thin branching tubes carry oxygen from the air to all the parts.
(iii) The opening of the spiracles is regulated by sphincters.
(iv) Exchange of gases take place at the tracheoles by diffusion.
(a) Only (i)
(b) (i), (ii) and (iii)
(c) (ii), (iii) and (iv)
(d) All of these

Question. Which of the following statements regarding frog is not correct?
(a) Fertilization is external and takes place in water.
(b) External ear and tympanum can be seen externally.
(c) In females the ureters and oviduct open separately in the cloaca.
(d) Copulatory pad on the first digit of the fore limbs and vocal sac are present in male frog.

Matching Type Questions

Question. Match column-I (type of epithelium) with column-II (Description) and choose the correct option.

Column-I (Types of epithelium)	Column-II (Description)
A. Squamous epithelium	I. It is composed of a  single-layer of cube-like cells
B. Cuboidal epithelium	II. Having cilia on their free surface
C. Columnar epithelium	III. It is composed of a single  layer of tall and slender cells
D. Ciliated epithelium	IV. It is made up of a single thin layer of flattened cells with irregular boundaries

(a) A – IV; B – I; C – III; D – II
(b) A – I; B – IV; C – III; D – II
(c) A – IV; B – I; C – II; D – III
(d) A – IV; B – III; C – I; D – II

Question. Match the terms given in column-I with their feature given in column-II and choose the correct option.

Column-I (Terms)	Column-II (Features)
A. Exocrine gland	I. They help to stop substances from leaking across a tissue
B. Endocrine gland	II. Hormones are secreted directly into the fluid bathing the gland
C. Tight junctions	III. They perform cementing to keep neighbouring cells together.
D. Adhering junctions	IV. Secretes mucus, saliva, earwax, oil, milk, digestive enzymes and other cell products

(a) A – IV; B – II; C – I; D – III
(b) A – II; B – IV; C – I; D – III
(c) A – IV; B – II; C – III; D – I
(d) A – IV; B – I; C – II; D – III

Question. Find the incorrectly matched pair.
(a) Unicellular glandular cells – Goblet cell
(b) Saliva – Exocrine secretion
(c) Fusiform fibres – Smooth muscle
(d) Cartilage – Areolar tissue

Question. Match the description given in column I with their examples given in column II and choose the correct option.

Column I (Description)	Column II (Example)
A. Aquatic respiratory organ	I. Skin
B. Organ which acts urogenital duct and opens into the cloaca	II. Ureter
C. A small median chamber that is used to pass faecal matter, urine and sperms to the exterior	III. Cloaca
D. A triangular structure which joins the right atrium and receives blood through vena cava	IV. Sinus venosus

(a) A – I; B – II; C – III; D – IV
(b) A – II; B – IV; C – I; D – III
(c) A – II; B – I; C – III; D – IV
(d) A – IV; B – II; C – I; D – III

Critical Thinking Type Questions

Question. Hair present in the skin are
(a) epidermal in origin and made of dead cells.
(b) epidermal in origin and made of living cells.
(c) dermal in origin and made of living cells.
(d) dermal in origin and made of dead cells.

Question. Non-ciliated simple columnar epithelium often contains _______, which increase the surface area for secretion and absorption.
(a) flagella
(b) collagen fibres
(c) microvilli
(d) all of these

Question. A student was given a sample of tissue. He observes and concludes the following characters.
(i) The cells are composed of a single layer of tall and slender cells.
(ii) Their nuclei are located at the base.
(iii) Free surface may have microvilli.
(iv) It is found in the lining of stomach and intestine
(v) They help in secretion and absorption.
Based on the above features identify the epithelium.
(a) Cuboidal epithelium
(b) Columnar Epithelium
(c) Squamous epithelium
(d) Glandular epithelium

Question. A student was given a specimen to identify on the basis of the characteristics given below.
(i) They are metamerically segmented.
(ii) Presence of closed circulatory system.
(iii) They have circular and longitudinal muscles for locomotion.
Identify the specimen.
(a) Frog
(b) Pheretima
(c) Cockroach
(d) Rabbit

Diagram Type Questions

Question. The given figure shows the nephridial system of earthworm and answer the question.

Select the option which shows the correct identification and the function of the structure marked as “X”.
(a) Lateral heart. It is a blood pumping organ.
(b) Calciferous glands. They neutralize the humic acid present in humus.
(c) Nephridia. It regulates the volume and composition of the body fluids.
(d) Blood glands. They produce blood cells and haemoglobin which is dissolved in blood plasma.

Question. Refer the given figure and identify the correct characteristic feature.

(i) It is a type of loose connective tissue.
(ii) It contains fibroblast, macrophages, collagen fibres and mast cells.
(iii) The cells of this tissue are specialized to store fats.
(iv) The wall of internal organs such as the blood vessels, stomach and intestine contains this type of tissue.
(a) (i) & (ii)
(b) (i) & (iii)
(c) (ii) & (iii)
(d) (iii) & (iv)

Question. Refer the given figure of female reproductive system of cockroach and identify the correct labels (marked as 1, 2, 3 and 4) which are collectively called genital pouch.

(a) 1 & 2
(b) 1 & 3
(c) 2 & 4
(d) 3 & 4