Structural Organisation in Animals Test

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Structural Organisation in Animals Test - 50

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Question 1
1 / -0

Chloragogen cells are present in

A
Body wall of Leucosolenia

B
Blood of earthworm

C
Coelomic fluid of earthworm

D
Blood of cockroach

Solution

The cells store glycogen and neutralize toxins, are yellowish in colour due to the presence of yellow granules called chlorosomes and are present in the coelomic fluid of some annelids.
These cells are derived from the inner coelomic epithelium, and help in excretory functions, as most commonly demonstrated in earthworms.
So the correct answer is 'Coelomic fluid of earthworm'.
Question 2
1 / -0

Dorsal vessel of earthworm is

A
Distributing

B
Collecting

C
Collecting in first thirteen segments and distributing in the rest

D
Distributing in first thirteen segments and collecting in the rest

Solution

The earthworm has a closed vascular system with blood vessels. The dorsal vessel in the first thirteen segments acts as a distributing vessel and extends upto the cerebral ganglion. It gives of branches that supply blood to the anterior regions of the body. After the thirteenth segment it acts as a collecting blood vessel and in each segment it receives blood from a pair of dorsointestinal vessels and commissural vessel.
So, the correct answer is 'Distributing in the first thirteen segments and collecting in the rest'.
Question 3
1 / -0

Typhlosole found in Pheretima occurs in

A
Oesophagus

B
Stomach

C
Gizzard

D
Intestine

Solution

A pair of short and conical intestinal caecae project from the intestine on the 26th segment. The characteristic feature of the intestine after the 26th segment except for the last 23rd - 25th segments in the presence of an internal median fold of dorsal wall called typhosole. This increases the effective area of absorption in the intestine.
So the correct answer is 'Intestine'.
Question 4
1 / -0

Chloragogen cells are involved in

A
Digestion

B
Excretion of water

C
Respiration

D
Fat storage

Solution

Chloragogen cells are the star-shaped cells and are also called as Y cells that have an excretory function in the coelomic fluid. They are also known as yellow cells due to the presence of yellow granule. They function like liver in vertebrates, they store glycogen and neutralizes toxins.
So the correct answer is 'Fat storage'.
Question 5
1 / -0

Enteronephric nephridia of Earthworm are

A
Pharyngeal and septal

B
Pharyngeal

C
Septal

D
Integumentary

Solution

Septal nephridia have an opening into the intestine of either the left or the right supra-intestinal excretory duct. The waste collected by the nephridia is discharged through the excretory canals and ducts into the lumen of the intestine. Such nephridia opening into the intestine are called enteronephric nephridia.
Pharyngeal nephridia also discharge their wastes into the alimentary canal and are, therefore, enteronephric but such enteronephric nephridia which open into the anterior region of the alimentary canal are called peptonephridia.
So the correct answer is 'Pharyngeal and septal'.
Question 6
1 / -0

Earthworms possess hearts

A
6 pairs

B
4 pairs

C
2 pairs

D
1

Solution

Earthworm possess a closed vascular system. There are four pairs of hearts in the circulatory system of earthworm , one pair each in 7,9,12 & 13 segments. The hearts located in 7 & 9 th segments are lateral hearts having 4 pairs of valves and those in 12 & 13 segments are called lateral oesophageal hearts having 3 pairs of valves.
So, the correct answer is '4 pairs'.
Question 7
1 / -0

Blood of Pheretima is

A
Blue with haemocyanin in corpuscles

B
Blue with haemocyanin in plasma

C
Red with haemoglobin in corpuscles

D
Red with haemoglobin in plasma

Solution

The blood of Pheretima is red colored due to the presence of respiratory pigment hemoglobin in it. The hemoglobin is not contained in the corpuscles like the vertebrates but it is found dissolved in the plasma. The plasma also contains many corpuscles which are colorless and nucleated.
So the correct answer is 'Red with hemoglobin in plasma'.
Question 8
1 / -0

In Earthworm, arrangement of blood vessels is

A
Different in last fifteen segments

B
Different in first thirteen segments

C
Same throughout

D
Different in middle thirteen segments

Solution

The circulatory system of an earthworm is a closed type, as the blood flows only through the blood vessels. The blood vascular system of Pheretima posthuma consists of an elaborate system of blood vessels through which blood flows continuously.
The blood vessels and their arrangement in the first thirteen segments
The blood vessels of the circulatory system of earthworm include longitudinal blood vessels, hearts, anterior loops, and the ring vessels.
So the correct answer is 'Different in the first thirteen segments'.
Question 9
1 / -0

In Earthworm, the first effective organ for food digestion is

A
Pharynx

B
Buccal cavity

C
Mouth

D
Stomach

Solution

A terminal mouth opens into the buccal cavity which leads into the muscular pharynx. A small narrow tube, oesophagus, continues into a muscular gizzard. It helps in grinding the soil particles and decaying dead leaves. The stomach extends from 9 - 14 segments. The food of the earthworm is decaying leaves and organic matter mixed with soil.Therefore the first organ for food digestion in earthworm is pharynx.
So the correct answer is 'Pharynx'.
Question 10
1 / -0

Excretory organs of Earthworm are

A
Coelom

B
Flame cells

C
Nephridia

D
Gizzard

Solution

The excretory organs occur as segmentally arranged coiled tubules called nephridia. They are of three types septal nephridia, integumentary nephridia, and pharyngeal nephridia. A nephridium starts out as a funnel that collects excess fluid from the ceolomic chamber. The funnel connects with a tubular part of the nephridium which delivers the wastes through a pore to the surface in the body wall into the digestive tube.
So the correct answer is 'Nephridia'.

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Re-Attempt Weekly Quiz Competition

Structural Organisation in Animals Test - 50

Result

Structural Organisation in Animals Test - 50

Score

-

Rank

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SHARING IS CARING

Question 1

Body wall of Leucosolenia

Blood of earthworm

Coelomic fluid of earthworm

Blood of cockroach

Solution

Question 2

Distributing

Collecting

Collecting in first thirteen segments and distributing in the rest

Distributing in first thirteen segments and collecting in the rest

Solution

Question 3

Oesophagus

Stomach

Gizzard

Intestine

Solution

Question 4

Digestion

Excretion of water

Respiration

Fat storage

Solution

Question 5

Pharyngeal and septal

Pharyngeal

Septal

Integumentary

Solution

Question 6

6 pairs

4 pairs

2 pairs

1

Solution

Question 7

Blue with haemocyanin in corpuscles

Blue with haemocyanin in plasma

Red with haemoglobin in corpuscles

Red with haemoglobin in plasma

Solution

Question 8

Different in last fifteen segments

Different in first thirteen segments

Same throughout

Different in middle thirteen segments

Solution

Question 9

Pharynx

Buccal cavity

Mouth

Stomach

Solution

Question 10

Coelom

Flame cells

Nephridia

Gizzard

Solution

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