CBSE Class 11 Biology VBQs Structural Organisation In Animals

Question. Cuboidal epithelium with brush border of microvilli is found in
(a) lining of intestine
(b) ducts of salivary glands
(c) proximal convoluted tubule of nephron
(d) Eustachian tube
Answer: C

Question. Goblet cells of alimentary canal are modified from
(a) squamous epithelial cells
(b) columnar epithelial cells
(c) chondrocytes
(d) compound epithelial cells. 
Answer: B

Question. The ciliated epithelial cells are required to move particles or mucus in a specific direction. In humans, these cells are mainly present in
(a) bronchioles and Fallopian tubes
(b) bile duct and bronchioles
(c) Fallopian tubes and pancreatic duct
(d) Eustachian tube and salivary duct. 
Answer: A

Question. In frog, gastrulation process involves
(a) epiboly
(b) emboly
(c) invagination
(d) all of these
Answer. D

Question. Which gland plays a key role in metamorphosis of frog ?
(a) Adrenal
(b) Thyroid
(c) Thymus
(d) Pancreas
Answer. B

Question. Match the following cell structure with its characteristic feature.
(A) Tight junctions (i) Cement neighbouring cells together to form sheet
(B) Adhering junctions (ii) Transmit information through chemical to another cells
(C) Gap junctions (iii) Establish a barrier to prevent leakage of fluid across epithelial cells
(D) Synaptic junctions (iv) Cytoplasmic channels to facilitate communication between adjacent cells
Select correct option from the following.
(A) (B) (C) (D)
(a) (ii) (iv) (i) (iii)
(b) (iv) (ii) (i) (iii)
(c) (iii) (i) (iv) (ii)
(d) (iv) (iii) (i) (ii) 
Answer: C

Question. Smooth muscles are
(a) involuntary, fusiform, non-striated
(b) voluntary, multinucleate, cylindrical
(c) involuntary, cylindrical, striated
(d) voluntary, spindle-shaped, uninucleate.
Answer: A

Question. The figure given below shows the head region of cockroach. Identify A to F.

(a) A- Compound eye, B-Ocellus, C-Maxilla,D-Mandible, E-Labrum, F-Labium
(b) A- Ocellus, B-Compound eye, C-Mandible,D-Maxilla, E-Labrum, F-Labium
(c) A- Ocellus, B-Compound eye, C-Mandible,D-Maxilla, E-Labium, F-Labrum
(d) A- Ocellus, B-Compound eye, C-Maxilla,D-Mandible, E-Labrum, F-Labium
Answer. B

Question. Which type of tissue correctly matches with its location?
Tissue Location
(a) Transitional epithelium Tip of nose 
(b) Cuboidal epithelium Lining of stomach
(c) Smooth muscle Wall of intestine
(d) Areolar tissue Tendons
Answer: C

Question. The function of the gap junction is to
(a) separate two cells from each other
(b) stop substance from leaking across a tissue
(c) performing cementing to keep neighbouring cells together
(d) facilitate communication between adjoining cells by connecting the cytoplasm for rapid transfer of ions, small molecules and some large molecules.
Answer: D

Question. Choose the correctly matched pair.
(a) Tendon - Specialized connective tissue
(b) Adipose tissue - Dense connective tissue
(c) Areolar tissue - Loose connective tissue
(d) Cartilage - Loose connective tissue 
Answer: C

Question. The type of epithelial cells which line the inner surface of fallopian tubes, bronchioles and small bronchi are known as
(a) squamous epithelium
(b) columnar epithelium
(c) ciliated epithelium
(d) cubical epithelium
Answer. C

Question. Choose the correctly matched pair.
(a) Inner lining of - Ciliated epithelium salivary ducts
(b) Moist surface - Glandular epithelium of buccal cavity
(c) Tubular parts of -Cuboidal epithelium nephrons
(d) Inner surface of - Squamous epithelium bronchioles
Answer: C

Question. The supportive skeletal structures in the human external ears and in the nose tip are examples of
(a) ligament
(b) areolar tissue
(c) bone
(d) cartilage.
Answer: D

Question. The ciliated columnar epithelial cells in humans are known to occur in
(a) Eustachian tube and stomach lining
(b) bronchioles and Fallopian tube
(c) bile duct and oesophagus
(d) Fallopian tube and urethra. 
Answer: B

Question. The cells lining the blood vessels belong to the category of
(a) smooth muscle tissue
(b) squamous epithelium
(c) columnar epithelium
(d) connective tissue.
Answer: B

Question. After a rainy day, earthworms were crawling on the moist soil of the fields. Father cautioned Rakesh to be careful so that earthworms are not crushed under his feet. Rakesh asked the reason and father replied that earthworms are farmer’s friends. Read the above passage and answer the following questions:
a) Why the earthworm regarded as farmers friend? Give two reasons.
b) Which habit of earthworm help in increasing soil fertility?
c) Name the term used for increase in soil fertility by earthworm?
Answer. A)Earthworm makes the soil porous by burrowing into it. Porous soil allow better aeration and quick absorption of water. Worm brings the fresh subsoil to the in finally divided form. It provide ideal medium for the germination of seeds.
B) Burrowing habits.
C) Vermicomposting.

Question. Anil a science student, told his younger brother that he came to know from his teacher that earthworm is farmers friend .he wanted to show the earthworms to the his younger brother and so, on a sunny day ,they went to the field to locate the earthworms. To their surprise, no earthworm was seen on the ground .He asked the reason from his biology teacher, the next day who explained the cause of their absence on the sunny day?
a) Why the earthworm not seen in the sunny days?
b) Where can you locate earthworm?
c) What was the reason of Anil’s curiosity about earthworms?
Answer. a) Earthworm keep the skin moist by secreting mucous to remain alive .On the sunny days, earthworms are unable to secrete mucous fast enough to make up for the lost evaporation and hence remain in burrows in the soil.
b) In moist soil which is rich in humus.
c) Anil, being a science student, wanted to gain scientific knowledge about earthworms and also to share this knowledge with youngsters.

Question. Biology teacher told in the class that cockroaches are of ancient lineage and resembled tothose insects who flourished in carboniferous period. Ramesh discussed this with the uncle who was a professor of zoology .his uncle explained that due to their remarkable adaptability, they are still surviving. Read the above passage and answer the following questions:
a) How old the evolutionary history of cockroach?
b) Which adaptation in cockroach helps them in their survival? List few of them?
c) What value is reflected the discussion between Ramesh and his uncle?
Answer. a) it is about 350 million year ago.
b) Flattened body’s slip into narrow spaces; arrangement and shapes of the legs for swift running, omnivorous laying of their eggs in oothecaeis major adaptation of cockroaches.
c) Ramesh desire to have clear understanding about animals and their adaptations.