Structural Organisation in Animals Test

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Structural Organisation in Animals Test - 92

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Question 1
1 / -0

Blood glands of Pheretima occur in segments

A
1, 2 and 3

B
3, 4 and 5

C
4, 5 and 6

D
10, 11 and 12

Solution

Blood glands are present on the 4th,5th and 6th segments. They produce blood cells and haemoglobin which is dissolved in blood plasma. Blood cells are phagocytic in nature. The blood vascular system of Pheretima is of closed type. It consists of the blood vessels, hearts, loops, capillaries, and the blood glands. Hence blood glands are present in 4th,5th and 6th segments.
So the correct answer is '4, 5 and 6'.
Question 2
1 / -0

Peculiar pungent smell of Cockroach is secretion of

A
Pheromone

B
Periplanata

C
Dermal glands

D
Cervical glands

Solution

Male cockroaches have glands that produce secretions for various purposes. These glands are called “stink glands”, and are present on the 5th and 6th abdominal segment of the insect. These stink glands are present on the dermis.
Secretions from the stink gland have a strong odour, that helps in keeping predators away. Any surface that a cockroach touches becomes tainted with the unpleasant smell from a secretion that it leaves behind.
So the correct answer is 'Dermal glands'.
Question 3
1 / -0

A respiratory pigment is absent in

A
Earthworm

B
Frog

C
Rabbit

D
Cockroach

Solution

Haemoglobin is absent in cockroach,the respiratory system consists of a network of trachea, that open through 10 pairs of small holes called spiracles present on the lateral side of the body. Thin branching tubes carry oxygen from the air to all the parts. The opening of the spiracles is regulated by the sphincters. Exchange of gases takes place at the tracheoles by diffusion.
So the correct answer is 'Cockroach'.
Question 4
1 / -0

In the following diagram of a leg of Cockroach parts have been indicated by alphabets. Choose the answer in which these alphabets have been correctly matched with the parts which they indicate

A
a = coxa, b = tibia, c = tarsus, d = femur, e = trochanter

B
a = coxa, b = femur, c = trochanter, d = tarsus, e = tibia

C
a = coxa, b = tarsus, c = femur, d = tibia, e = trochanter

D
a = coxa, b = trochanter, c = femur, d = tibia, e = tarsus

Solution

In Cockroach, there are three pairs of thoracic legs on the ventral side. Each leg is five jointed or segmented. The upper portion of the leg, called the coxa, attaches the leg to the thorax. The other parts of the leg approximate parts of a human leg: The trochanter acts like a knee and lets the roach bend its leg. The femur and tibia resemble thigh and shin bones.
So the correct answer is 'a = coxa, b = trochanter, c = femur, d = tibia, e = tarsus'.
Question 5
1 / -0

In Pheretima coelomic fluid contains

A
Dissolved haemoglobin

B
Dissolved RBC

C
Broken WBC

D
Watery plasma

Solution

The coelomic fluid is generally secreted by the earthworms for maintaining moisture to help their physiological activities such as respiration and burrowing activities. It consists of a watery matrix, the plasma and a large number of coelomocytes. The composition of the fluid varies markedly depending on its source and is regulated more or less precisely by homeostasis.
So the correct answer is 'Watery plasma'.
Question 6
1 / -0

Somites/metameres/segments present in the body of earthworm are

A
60-80

B
80-100

C
100-120

D
120-160

Solution

Earthworms are segmented and are externally covered by rings that encircle the body. Earthworm is divided into segments 100-200 segments similar segments called somites or metameres. Segments are separated from each other by distinct ring-like grooves. External segmentation corresponds to the internal segmentation of the body. Each segment of the group of segments can become specialized to perform a particular function.
So the correct answer is '100-200 segments'.
Question 7
1 / -0

In Cockroach enzyme cellulase is produced by

A
Saliva

B
Lining cells of midgut

C
Bacteria in midgut

D
Cellulose is not metabolised

Solution

Cellulase occurs in the American cockroach and originates in two foci the salivary glands and the lumen of the midgut and caeca. The salivary glands are the only tissue of the alimentary tract to secrete cellulase, whereas the microflora generates it in the gut. Digestion occurs mainly in the midgut, where a large portion of the insect’s digestive enzymes are produced and secreted, including proteases, lipases, and carbohydrases.
So the correct answer is 'Bacteria in midgut'.
Question 8
1 / -0

In Earthworm, cocoon is formed by

A
Epidermal muscles

B
Setae

C
Cuticle

D
Clitellum

Solution

The clitellum is a thickened glandular and non-segmented section of the body wall near the head in earthworms and leeches, that secretes a viscid sac in which the eggs are deposited. It is located near the anterior end of the body (around the 14th, 15th and 16th 17th segments). Its main function is to store the eggs of the worm. To form a cocoon for its eggs, the clitellum secretes a viscous fluid. n earthworms, the clitellum can only be seen when the worm is sexually mature.
So, the correct answer is 'Clitellum'.
Question 9
1 / -0

Which one neutralises humic acid present in humus in the body of Earthworm?

A
Intestinal caecum

B
Typhlosole

C
Gizzard

D
Calciferous glands

Solution

In earthworm, a small narrow tube, oesophagus (5-7 segments), continues into a muscular gizzard (8-9 segments). It helps in grinding the soil particles and decaying leaves, etc. The stomach extends from 9-14 segments.
The food of the earthworm is decaying leaves and organic matter mixed with soil.
Calciferous glands, present in the stomach, neutralize the humic acid present in humus.
So the correct answer is 'Calciferous glands'.
Question 10
1 / -0

Arrange the parts of alimentary canal of cockroach in correct order : I. Stomodaeal valve. II. Crop. III. Ileum. IV. Proventriculus. V. Mesenteron, VI. Colon.

A
IV, II, V, I, III, VII

B
V, II, I, III, VI, V

C
II, IV, I, V, III, VI

D
II, IV, I, III, V, VI

Solution

The alimentary canal of a cockroach is having three parts, foregut, midgut, and hindgut. Whereas the alimentary canal is divided into three main portions. These are Foregut, which consists of a mouth surrounded by mouthparts. The mouth cavity is the pharynx. It continues as the oesophagus and further the canal enlarges into the crop which is thin-walled. The crop opens into short, muscular organs, the gizzard, or proventriculus. The midgut is found at the junction of the gizzard and the stomach is valves called the stomodael valves. The midgut forms the mesenteron. It consists entirely of the stomach and ventriculus. The hindgut is a coiled structure. It consists of the anterior ileum, middle colon, and posterior rectum.

Thus, the correct answer is an option (C).

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Structural Organisation in Animals Test - 92

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Question 1

1, 2 and 3

3, 4 and 5

4, 5 and 6

10, 11 and 12

Solution

Question 2

Pheromone

Periplanata

Dermal glands

Cervical glands

Solution

Question 3

Earthworm

Frog

Rabbit

Cockroach

Solution

Question 4

a = coxa, b = tibia, c = tarsus, d = femur, e = trochanter

a = coxa, b = femur, c = trochanter, d = tarsus, e = tibia

a = coxa, b = tarsus, c = femur, d = tibia, e = trochanter

a = coxa, b = trochanter, c = femur, d = tibia, e = tarsus

Solution

Question 5

Dissolved haemoglobin

Dissolved RBC

Broken WBC

Watery plasma

Solution

Question 6

60-80

80-100

100-120

120-160

Solution

Question 7

Saliva

Lining cells of midgut

Bacteria in midgut

Cellulose is not metabolised

Solution

Question 8

Epidermal muscles

Setae

Cuticle

Clitellum

Solution

Question 9

Intestinal caecum

Typhlosole

Gizzard

Calciferous glands

Solution

Question 10

IV, II, V, I, III, VII

V, II, I, III, VI, V

II, IV, I, V, III, VI

II, IV, I, III, V, VI

Solution

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