Structural Organisation in Animals Test

Result

Structural Organisation in Animals Test - 51

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Weekly Quiz Competition

Question 1
1 / -0

Spermathecal pores of Pheretima are present in

A
5/6, 6/7, 7/8 and 8/9

B
6/7, 7/8, 8/9 and 9/10

C
1/2, 2/3, 3/4 and 4/5

D
14/15, 15/16, 16/17 and 17/18

Solution

Four pairs of spermathecae which are flask-shaped with broad pear-shaped ampulla and a short diverticulum or caecum having a narrow neck. The ampulla store nutritive substance produced by prostate gland whereas in diverticulum spermatozoa are stored. It opens intersegmental ly and ventrolaterally in 5/6, 6/7, 7/8, 8/9 a pair each.
So the correct answer is '5/6, 6/7, 7/8 and 8/9'.
Question 2
1 / -0

Anal style is present in

A
Male Cockroach

B
Female Cockroach

C
Both the sexes

D
None of the two

Solution

In males, the genital pouch is present at the hind end of the abdomen. The male cockroach has thread-like anal styles, which are missing in the female cockroach. The 10th segment has a filamentous structure called the anal cerci, in both male and female cockroach.
So the correct answer is 'Male Cockroach'.
Question 3
1 / -0

Spiracles of Cockroach which are larger and always kept open are

A
First and second pairs

B
First and third pairs

C
First and tenth pairs

D
Second and third pairs

Solution

Spiracles are external openings found in some animal species, such as insects, spiders and some species of fish and whales. The function of spiracles is linked to respiration, helping oxygen to reach internal respiratory organs, such as lungs in whales and tracheae in insects.
In cockroach, the tracheal system opens outside by ten pairs of spiracles. The first and third pairs spiracles remain open all the times.
So, the correct answer is 'First and third pairs'.
Question 4
1 / -0

Which of the following is the characteristic of Cockroach?

A
13-chambered heart

B
Reduced wings

C
Cocoon formation

D
Segmented body

Solution

The heart of the cockroach is elongated, thick, muscular, tubular and 13-chambered. It lies in the pericardial sinus of the hemocoel. Each chamber of the heart receives oxygenated blood from the dorsal sinus through one pair of slit-like openings called ostia. The heart contracts in a posteroanterior direction and the blood also flows posteroanterior. The alary muscles are responsible for the circulation of blood.
So the correct answer is '13-chambered heart'.
Question 5
1 / -0

Blood of Cockroach does not contain respiratory pigment. It means Cockroach

A
Does not respire

B
Respires anaerobically

C
Oxygen goes to tissues by intracellular capillary system

D
Oxygen reaches tissues directly through diffusion

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 'Oxygen reaches tissues directly through diffusion'.
Question 6
1 / -0

In Cockroach the longest podomere is

A
Coxa

B
Trochanter or Femur

C
Tibia

D
Tarsus

Solution

All the three pans of legs have the same structure and so they are serially homologous.
• In Cockroach 3 pairs of legs are present.
• Each leg is made up of 5 segments
• Coxa articulates with the thoracic segment. it is broad and highly muscular.
• The longest podomere in the leg of Cockroach is Tibia.
So the correct answer is 'Tibia'.
Question 7
1 / -0

Chromophil cells present on pharynx of earth worm take part in secretion of

A
Mucus

B
Lipases

C
Carbohydrases

D
All the above

Solution

The pharyngeal secretions of the earthworm are produced by a large number of chromophil cells. These are found in soft white lobules which are located on the dorsal and ventral side of the pharynx. It passes through the connective tissues of the pharynx between the epithelial lining and the pharyngeal lumen. The secretion is mucinous. It also contains the fibrous digesting enzyme.
So the correct answer is 'Mucus'.
Question 8
1 / -0

13-chambered tubular heart is found in

A
Cockroach

B
Earthworm

C
Frog

D
Rabbit

Solution

The heart of the cockroach is elongated, thick, muscular, tubular and 13-chambered. It lies in the pericardial sinus of the hemocoel. Each chamber of the heart receives oxygenated blood from the dorsal sinus through one pair of slit-like openings called ostia. The heart contracts in a posteroanterior direction and the blood also flows posteroanteriorly. The alary muscles are responsible for the circulation of blood.
So the correct answer is 'Cockroach'.
Question 9
1 / -0

The component units of compound eye of Cockroach are called

A
Eyelets

B
Fenestrae

C
Ocelli

D
Ommatidia

Solution

Compound eyes are so called because they are constructed from many similar units called ommatidia. Each compound eye may be composed of several thousand ommatidia. With the help of several ommatidia, a cockroach can receive several images of an object. The compound eyes are situated at the dorsal surface of the head.
So the correct answer is 'Ommatidia'.
Question 10
1 / -0

Colleterial gland is present in

A
Male Cockroach

B
Female Cockroach

C
Both the sexes

D
None of the two

Solution

The colleterial glands of insects are organs associated with the female genital apparatus. In cockroaches, these glands produce secretions that cover two parallel rows of eggs during oviposition, and in oviparous species, these secretions become the tanned, sculpted, rigid outer casing of the ootheca.
So the correct answer is 'Female Cockroach'.

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Re-Attempt Weekly Quiz Competition

Structural Organisation in Animals Test - 51

Result

Structural Organisation in Animals Test - 51

Score

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SHARING IS CARING

Question 1

5/6, 6/7, 7/8 and 8/9

6/7, 7/8, 8/9 and 9/10

1/2, 2/3, 3/4 and 4/5

14/15, 15/16, 16/17 and 17/18

Solution

Question 2

Male Cockroach

Female Cockroach

Both the sexes

None of the two

Solution

Question 3

First and second pairs

First and third pairs

First and tenth pairs

Second and third pairs

Solution

Question 4

13-chambered heart

Reduced wings

Cocoon formation

Segmented body

Solution

Question 5

Does not respire

Respires anaerobically

Oxygen goes to tissues by intracellular capillary system

Oxygen reaches tissues directly through diffusion

Solution

Question 6

Coxa

Trochanter or Femur

Tibia

Tarsus

Solution

Question 7

Mucus

Lipases

Carbohydrases

All the above

Solution

Question 8

Cockroach

Earthworm

Frog

Rabbit

Solution

Question 9

Eyelets

Fenestrae

Ocelli

Ommatidia

Solution

Question 10

Male Cockroach

Female Cockroach

Both the sexes

None of the two

Solution

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