Structural Organisation in Animals Test

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Structural Organisation in Animals Test - 87

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Weekly Quiz Competition

Question 1
1 / -0

In cockroach, conglobate gland occurs in

A
Females

B
Males

C
Nymph

D
Both A and B.

Solution

The conglobate gland is the reproductive accessory gland present in the male cockroaches. It is involved in the formation of spermatophore.
So the correct answer is 'Males'.
Question 2
1 / -0

Node of Ranvier occurs where

A
Nerve is covered with myelin sheath

B
Neurolemma is discontinuous

C
Neurolemma and myelin sheath are discontinuous

D
Myelin sheath is discontinuous
Solution
- Myelin sheath is a fat layer formed by the Schwann cells that surround the axon.
- They are not continuous but leave gaps in between called the nodes of Ranvier
So, the correct answer is 'Myelin sheath is discontinuous'
Question 3
1 / -0

Which of the two parts of Periplanata appear similar in structure fundamentally?

A
Legs and maxillae

B
Mandibles and antennae

C
Anal cerci and wings

D
Labrum and anal styees

Solution

Maxillae and legs are fundamental structure of Periplanata (cockroach) and appear similar. Maxillae consist of 3 parts (protopodite, endopodite, and expodite). Legs are three pairs and each pair consists 5 parts, coxa (strong proximal and broad part) trochantor (triangular short), spiny tibia and long distal tarsus. Thus, the correct answer is option A.
Question 4
1 / -0

Regarding blood circulation, it maybe said that in Pheretima the dorsal vessel is a

A
Collecting vessel in first two segments and distributing vessel in other

B
Distributing vessel in the first five segments and collecting vessel in other

C
Collecting vessel in thirteen, segments and distributing vessel in intestinal

D
Distributing vessel in first thirteen segments and collecting vessel in intestinal region

Solution

Dorsal blood vessel of earthworm is the largest blood vessel. It occurs mid dorsally above the alimentary canal and runs from one end of the body to other. It collects blood from various parts behind the 13$$^{th}$$ segment, however in the first thirteen segments, it behaves a distributing channel.
Question 5
1 / -0

Peculiar pungent smell of Cockroach is secretion of

A
Pheromones

B
Periplaneta

C
Dermal glands

D
Cervical glands.

Solution

Cockroaches are social insects. They secrete pheromones to attract the other mates and create a peculiar pungent smell.
So the correct answer is 'Pheromones'.
Question 6
1 / -0

Respiratory pigment in Pheretima is present in

A
Erythrocytes

B
Plasma

C
Yellow cells

D
Mucocytes

Solution

Earthworm does their gaseous exchange with the help of skin and hence they don't need red blood cell in the blood. Instead, the respiratory pigment haemoglobin is dissolved in blood plasma. The circulation is closed type.
So, the correct answer is 'Plasma'.
Question 7
1 / -0

Intestinal caeca of earthworm lie between

A
22-26 segments

B
20-24 segments

C
14-16 segments

D
33-36 segments

Solution

The intestine starts from the 15th segment and continues till the last segment. A pair of the short and conical intestinal caecae project from the intestine in the 26th segment. An internal median fold of the dorsal wall of the intestine called typhlosole, helping in increasing the area of absorption (between the 26thand the rectum, which occupies the last 23 to 28 segments).
So the correct answer is '22-26 segments'.
Question 8
1 / -0

Oxygen is carried from skin to different parts of body in earthworm by

A
Blood plasma

B
Blood corpuscles

C
Both A and B

D
A special pigment called haemocyanin

Solution

In earthworm blood glands are present in the 4th,5th and 6th segments. They are produced blood cells and haemoglobin which is dissolved in blood plasma. Blood cells are phagocytic in nature. Hence oxygen is carried from the skin to different parts of the body in Earthworm is by blood plasma and blood corpuscles.
So the correct answer is 'Both A and B'.
Question 9
1 / -0

In earthworm, the septal nephridia begin from behind ........... segment.

A
18

B
17

C
15

D
13

Solution

Nephridia remove metabolic wastes from an animals body just like vertebrate kidneys. In an earthworm, the septal nephridia occur in segment 15 onwards and are attached to septa. It is open internally and varies from 80 to 100 per segment. It removes metabolic wastes from the blood and coelomic fluid and is largest in size.
So, the correct answer is '15'.
Question 10
1 / -0

In earthworm, pharyngeal nephridia occur in segments

A
4,5 and 6

B
5,6, and 7

C
6,7 and 8

D
3,4 and 5

Solution

Nephridia remove metabolic wastes from an animals body just like vertebrate kidneys. In an earthworm, the pharyngeal nephridia occure as three pairs in segments 4,5 and 6. They are closed internally without nephrostome and removes metabolic wastes from the blood only.
So, the correct answer is '4,5 and 6'.

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Re-Attempt Weekly Quiz Competition

Structural Organisation in Animals Test - 87

Result

Structural Organisation in Animals Test - 87

Score

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Rank

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SHARING IS CARING

Question 1

Females

Males

Nymph

Both A and B.

Solution

Question 2

Nerve is covered with myelin sheath

Neurolemma is discontinuous

Neurolemma and myelin sheath are discontinuous

Myelin sheath is discontinuous

Solution

Question 3

Legs and maxillae

Mandibles and antennae

Anal cerci and wings

Labrum and anal styees

Solution

Question 4

Collecting vessel in first two segments and distributing vessel in other

Distributing vessel in the first five segments and collecting vessel in other

Collecting vessel in thirteen, segments and distributing vessel in intestinal

Distributing vessel in first thirteen segments and collecting vessel in intestinal region

Solution

Question 5

Pheromones

Periplaneta

Dermal glands

Cervical glands.

Solution

Question 6

Erythrocytes

Plasma

Yellow cells

Mucocytes

Solution

Question 7

22-26 segments

20-24 segments

14-16 segments

33-36 segments

Solution

Question 8

Blood plasma

Blood corpuscles

Both A and B

A special pigment called haemocyanin

Solution

Question 9

18

17

15

13

Solution

Question 10

4,5 and 6

5,6, and 7

6,7 and 8

3,4 and 5

Solution

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