Hello Students. In this article, I have brought to you multiple-choice questions from the Biology chapter "Structural Organization in Animals". In this chapter, we study how cells work together to form tissues, organs, and organ systems in animals. I have also provided detailed solutions and explanations for the answers to all the questions.
For chapter-wise MCQ questions, visit the following links:
Questions
1. Lymphoid tissue is found in
a) Thymus
b) Tonsils
c) Lymph nodes
d) All of these
2. Earthworm lives in the burrows made by boring and swallowing the soil to
a) Uptake food
b) Get moisture
c) Procreation
d) Avoid opponents
3. Which of the following cells are round and biconcave in shape?
a) White blood cells
b) Red blood cells
c) Columnar epithelial cells
d) Nerve cells
4. Given below the diagram of the internal organs of a frog and identify A to F
a) A-Gall bladder, B-Lungs, C-Testis, D-Kidney, E-Urethra, F-Urinary bladder
b) A-Gall bladder, B-Lungs, C-Fat bodies, D-Kidney, E-Rectum, F-Urinary bladder
c) A-Gall bladder, B-Lungs, C-Ovary, D-Kidney, E-ileum, F-Urinary bladder
d) A-Gall bladder, B-Lungs, C-Fat bodies, D-Kidney, E-Colon, F-Urinary bladder
5. The clitellum divides the body of the earthworm into …… regions
a) 3
b) 2
c) 4
d) 5
6. Identify A, B and C in the given diagram of adipose tissue
a) A-Cytoplasm, B-Nucleus, C-Cell wall
b) A-Fat storage area, B-Mast cell, C-Plasma membrane
c) A-Cell fluid, B-Collagen fibres, C-Plasmalemma
d) A-Fat storage area, B-Nucleus, C-Plasma membrane
7. How many litres of blood is present in the normal human body?
a) 6.8 L
b) 6.0 L
c) 5.9 L
d) 7.2 L
8. The lining of body cavities, ducts and tube are made up of
a) Compound epithelium
b) Simple epithelium
c) Cuboidal epithelium
d) Keratinised epithelium
9. Which of the following metalloproteins is found in the blood of earthworms?
a) Haemoglobin
b) Hemerytherin
c) Hemocyanin
d) Myoglobin
10. Histamine, serotonin and heparin are secreted by
a) Lymphocytes
b) Monocytes
c) Neutrophils
d) Basophils
11. Find out the wrongly matched pair.
a) Squamous epithelium - Skin of frog
b) Columnar epithelium - Peritoneum of body cavity
c) Ciliated epithelium - Bronchioles
d) Stratified squamous epithelium - Oesophagus
12. The body wall of the earthworm is covered by which of the following layers (externally or externally)?
a) Epidermis, cuticle, coelomic epithelium, longitudinal muscle, circular muscles.
b) Cuticle, epidermis, circular muscles, coelomic epithelium, longitudinal muscle.
c) Non-cellular cuticle, epidermis, circular muscles, longitudinal muscles, coelomic epithelium.
d) Coelomic epithelium, epidermis, cuticle, circular muscles, longitudinal muscles.
13. The number of pairs of cranial nerves arising from the brain of a frog is
a) 10
b) 9
c) 8
d) 7
14. The ova of the earthworms are fertilised by the sperm within the
a) Cocoon
b) Seminal vesicles
c) Soil
d) None of the above
15. Which of the following tissues provides a covering layer for some of the body parts?
a) Connective tissues
b) Muscular tissues
c) Epithelial tissues
d) Neural tissues
16. Consider the following statements about the connective tissue
I. Their special function is linking and supporting the other organs tissues of the body
II. It is the most abundant type of animal tissue
III. Blood is a specialised connective tissue which contains collagen
IV. The cells of connective tissue secrete mucous
Which of the statements given above are incorrect?
a) I and II
b) II and III
c) III and IV
d) I, II, III and IV
17. Which of the following types of connective tissue is present at the tip of the human nose?
a) Cartilage
b) Bone
c) Adipose tissue
d) None of these
18. The tissue which forms the glands in humans is
a) Muscular tissue
b) Nervous tissue
c) Epithelium tissue
d) Connective tissue
19. How many species of Pheretima are found all over the world?
a) 200
b) 300
c) 400
d) 500
20. In which of the following segments of earthworm, septal nephridia is present?
a) 15-last
b) 8-15
c) 18-last
d) 15-17
Answers
Solutions
1 (d)
Lymphoid tissue consists of spleen, tonsils, lymph nodes, thymus gland, Peyer’s patches, liver, etc. Such organs secrete lymph, producing lymphocytes which are known as lymphoid organs. The spleen is the largest mass of lymphatic tissue in the body. Lymphoid tissue shares responsibility with myeloid tissue (red bone marrow) for producing agranular leucocytes.
2 (b)
Earthworm is a reddish-brown terrestrial invertebrate that lives in moist soil, rich in humus. They are soft and naked and, hence cannot survive on the dry earth. Therefore, they live in burrows made by boring and swallowing the soil.
3 (b)
Red blood cells (RBC_S) or erythrocytes are the most abundant of all the cells in blood. They are devoid of nuclei in most mammals and are round or biconcave in shape. It is biconcave because such a shape has increased surface area (for O_2transfer) and allows easy squeezability of the RBC_S through the blood vessels.
4 (b)
A-Gall bladder; B-Lungs; C-Fat bodies; D-Kidney; E-Rectum; F-Urinary bladder.
5 (a)
Clitellum divides the body of earthworm into three regions; preclitellar, clitellar and postclitellar. segments.
6 (d)
A-Fat storage area
B-Nucleus
C-Plasma membrane
7 (a)
An average adult person has about 6.8 litres of blood.
8 (b)
Simple epithelium is composed of a single layer of cells and functions as a lining for body cavities, ducts and tubes.
9 (a)
In earthworms, the blood glands are present on the 4th, 5th and 6th. They produce blood cells and haemoglobin which gets dissolved in the blood plasma. Blood contains leucocytes only.
10 (d)
Basophils (one of the types of granulocytes) secrete histamine, serotonin, heparin, etc., and are involved in inflammatory reactions. They are probably like mast cells of connective tissue.
11 (b)
Squamous epithelium - Skin of frog
Columnar epithelium - Stomach
Ciliated epithelium - Bronchioles
Stratified squamous epithelium - Oesophagus
Glandular epithelium - Salivary gland
12 (c)
The body wall of the earthworm is covered by a non-cellular cuticle, epidermis, circular muscles and longitudinal muscles, and coelomic epithelium.
13 (a)
There are ten pairs of cranial nerves arising from the brain of the frog.
14 (a)
In Pheretima fertilization is external (outside the body) within specialised structures called cocoons. These are hard shell structures containing mature sperm, egg cells and nutritive fluid. These hard structures are developed due to the hardening of clitellar secretions.
15 (c)
Epithelial tissue has a free surface, which faces either a body fluid or the outside environment and thus provides a covering to body parts.
16 (c)
Specialised connective tissues include cartilage, bone, adipose and blood. In all connective tissues, except blood the cells secrete collagen. Blood is a fluid connective tissue containing plasma, RBCs and WBCs. Cells of connective tissues secrete fibres of structural proteins called collagen or elastin. These fibres provide strength, elasticity and flexibility to the tissues.
17 (a)
Cartilage is a specialised connective tissue, which is solid, pliable and resists compression.
18 (c)
The glandular epithelium consists of specialised columnar or cuboidal cells, which are specialised for secretion. They may be unicellular, e.g., goblet cells of the alimentary canal or multicellular, e.g., salivary gland.
19 (d)
There are about 500 species of earthworms all over the world.
20 (a)
Septal nephridia, present on both sides of the intersegmental septa from segment 15 to the last opens into the intestine of earthworm’s excretory system.
These were the 20 questions from Structural Organization in Animals. Thanks for visiting.