Structural Organisation in Animals Test

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Structural Organisation in Animals Test - 90

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Weekly Quiz Competition

Question 1
1 / -0

Ocelli or fenestrae of Cockroach take part in

A
Sight

B
Perception of temperature

C
Perception of light

D
Perception of humidity

Solution

The ocelli are paired circular areas one on each side of the eye, near the base of the antennae. Each area acts as a simple eye and is responsible for detecting light. Ocelli or fenestrae of cockroach take part in perception of light.
So, the correct answer is 'Perception of light'.
Question 2
1 / -0

Mushroom or utricular gland of male cockroach takes part in

A
Nourishing of sperms

B
Storing of sperms

C
Formation of inner membrane of spermatophore

D
All the above
Solution
The utricular gland is a large whitish gland which is made up of two kinds of glandular tubules.
The peripheral, long, slender tubules utriculi majors, whose secretion also forms the covering of spermatophore.
The central, short tubules, utriculi breviores, whose secretion nourishes the sperms.
The mushroom-shaped glands store the food.
So the correct answer is 'All the above'.
Question 3
1 / -0

Hormone ecdysone is produced by

A
Corpora allata

B
Prothoracic glands

C
Corpora cardiaca

D
Intercerebral gland cells

Solution

Ecdysone is a steroidal prohormone of the major insect molting hormone 20-hydroxyecdysone, which is secreted from the prothoracic glands. The steroid ecdysone secreted from the Y-organ stimulates molting. After it is released into the blood, ecdysone is converted to a 20-hydroxyecdysone, which is the active molting hormone. Secretion of ecdysone is blocked by a neurohormone called molt-inhibiting hormone, produced by the eyestalk complex.
So the correct answer is 'Prothoracic glands'.
Question 4
1 / -0

A stenohygrous animal is

A
Cockroach

B
Frog

C
Rat

D
Rabbit

Solution

Frog is a stenohygrous animal which is also known as Amphibious animal. It lives in or near freshwater bodies, like ponds, lakes, ditches, marshes and even slow running waters. Frog tolerant to a broad range of atmospheric moisture.
So the correct answer is 'Frog'.
Question 5
1 / -0

Nerve cord of Cockroach is

A
Dorsal and single

B
Dorsal and double

C
Ventral and single

D
Ventral and double

Solution

In cockroach, ventral nerve cord is present on ventral side of the alimentary canal.
• It consists of two longitudinal nerves which are solid. Hence it is described as a double solid ventral nerve cord.
• The nerve cord extends in between sub- oesophageal ganglia and the last abdominal ganglia present in the 7th segment.
So the correct answer is 'Ventral and double'.
Question 6
1 / -0

Number of spiracle pairs in Periplanata americana is

A
8

B
9

C
10

D
11

Solution

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 parts. The opening of the spiracles is regulated by the sphincters.
So the correct answer is '10'.
Question 7
1 / -0

In Earthworm, genital papillae occur in segments

A
16 and 17

B
16 and 18

C
17 and 19

D
17 and 18

Solution

Genital papillae have two pairs of whitish, spherical structures found one pair in each of the 17th and 19th segment. Found on the ventrolateral body wall on either side of the ventral nerve cord.
They open to the exterior by a number of ducts on two pairs of genital papillae, situated in 17th and 19th segment. Secretion of these gland helps in holding two worms during copulation.
So the correct answer is '17 and 19'.
Question 8
1 / -0

Flow of blood in dorsal blood vessel of earthworm is

A
Backward

B
Forward

C
Sideward

D
Downward

Solution

Pheretima exhibits a closed type of blood vascular system, consisting of blood vessels, capillaries, and heart. Due to the closed circulatory system, blood is confined to the heart and blood vessels. Contractions keep blood circulating in one direction. Smaller blood vessels 'supply the gut, nerve cord, and the body wall. Hence blood flows only in one direction i.e forwardly.
So the correct answer is 'Forward'.
Question 9
1 / -0

Region of Earthworm which is forest of nephridia is

A
Clitellar region

B
Pharyngeal region

C
Typhlosolar region

D
Intestinal region

Solution

In Earthworm each segment of the body from 7th to the last segment, numerous nephridia are found attached inside the lining of the body wall. These are called integumentary nephridia which are about 200-250 in each segment except the segment of the clitellar region where the number 2,000-2,500 in each segment.
These nephridia are small-sized, without nephrostome and without any opening into the coelom. Therefore this region of Earthworm is a forest of nephridia.
So the correct answer is 'Clitellar region'.
Question 10
1 / -0

The clitellum or cingulum in earthworm is present in

A
12, 13 and 14 segments

B
13, 14 and 15 segments

C
14,15 and 16 segments

D
16, 17 and 18 segments

Solution

The first body segment is called the peristomium (buccal segment) which contains the mouth. In a mature worm, segments 14, 15 and 16 segments are covered by a prominent dark band of glandular tissue called clitellum. Thus the body is divisible into three prominent regions - preclitellar, clitellar and postclitellar segments.
So the correct answer is '14, 15 and 16 segments'.

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Re-Attempt Weekly Quiz Competition

Structural Organisation in Animals Test - 90

Result

Structural Organisation in Animals Test - 90

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SHARING IS CARING

Question 1

Sight

Perception of temperature

Perception of light

Perception of humidity

Solution

Question 2

Nourishing of sperms

Storing of sperms

Formation of inner membrane of spermatophore

All the above

Solution

Question 3

Corpora allata

Prothoracic glands

Corpora cardiaca

Intercerebral gland cells

Solution

Question 4

Cockroach

Frog

Rat

Rabbit

Solution

Question 5

Dorsal and single

Dorsal and double

Ventral and single

Ventral and double

Solution

Question 6

8

9

10

11

Solution

Question 7

16 and 17

16 and 18

17 and 19

17 and 18

Solution

Question 8

Backward

Forward

Sideward

Downward

Solution

Question 9

Clitellar region

Pharyngeal region

Typhlosolar region

Intestinal region

Solution

Question 10

12, 13 and 14 segments

13, 14 and 15 segments

14,15 and 16 segments

16, 17 and 18 segments

Solution

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