Structural Organisation in Animals Test

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Structural Organisation in Animals Test - 3

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Weekly Quiz Competition

Question 1
4 / -1

Pheretima and its close relative derive nourishment from

A
sugarcane roots

B
decaying fallen leaves and soil organic matter

C
soil insects

D
small pieces of fresh fallen leaves of maize, etc

Solution

Pheretima and its close relatives derive nourishment from decaying organic matter found in the soil. They also feed on the bits of plants and animal matter.
Question 2
4 / -1

Which of the following is incorrect for Pheretima?

A
Genital papillae are present in 17^th and 19^th segment

B
Male genital pores are present on 18^th segment

C
Clitellum is present on segments 24, 25, 26

D
Segments of earthworm are called somites

Solution

Clitellum or cingulum is a prominent circular band of glandular skin found from the 14^th to 16th segments. It secretes mucus and albumen which helps in the formation of cocoon, and is used from fertilization of the eggs.
Question 3
4 / -1

The lateral hearts in earthworm have

A
Four pairs of valves and are situated in segment 7 and 9

B
Four pairs of valves and are situated in segment 6 and 8

C
Three pairs of valves and are situated in segment 8 and 10

D
Two pairs of valves and are situated in segment 6 and 11

Solution

A pair of large, thick and muscular vertical vessels, called hearts, are present in each of the segments 7, 9, 12 and 13 in earthworm. Hearts of 7^th and 9^th segments are called lateral hearts that connect dorsal and ventral vessels only. They consist of 4 pairs of valves
Question 4
4 / -1

Blood vessels in Pheretima, which have valves are

A
dorsal

B
ventral

C
supra-oesophageal

D
lateral oesophageal

Solution

Blood vessels of Pheretima, which have valves are dorsal. Blood passes from backward to forward direction. To prevent the backward flow of the blood, valves are present infront of each septum.
Question 5
4 / -1

One very special feature in the earthworm (Pheretima) is that

A
Fertilization of eggs occurs inside the body

B
The typhlosole greatly increases the effective absorption area of the digested food in the intestine

C
The S-shaped setae embedded in the integument are the defensive weapons used against the enemies

D
It has a long dorsal tubular heart

Solution

From the 27^th segment upto 23-25 segments in front of the anus in intestine of earthworm, lies a highly glandular and vascular part called typhlosole. It greatly increases the effective absorption area for digested food in the intestine.
Question 6
4 / -1

Which one of the following structures in Pheretima is correctly matched with its function?

A
Clitellum - secretes cocoon

B
Gizzard - absorbs digested food

C
Setae - defence against predators

D
Typhlosole - storage of extra nutrients

Solution

Clitellum - secretes cocoon where fertilization and development takes place.
Gizzard - grinds the food
Setae - help in locomotion
Typhlosole - increases area of absorption in intestine
Question 7
4 / -1

Which of the following is absent in the coelomic fluid of earthworm?

A
Salts

B
Haemoglobin

C
Corpuscles

D
Proteins

Solution

Coelomic fluid of earthworm is alkaline, colourless fluid containing water, slats some proteins and corpuscles. Haemoglobin is not present in coelomic fluid. It is found dissolved in blood plasma giving red colour to blood. Blood is confined to heart and vessels in closed circulatory system.
Question 8
4 / -1

Which of the following structures is correctly matched with its description?

A
Septal nephridia and pharyngeal nephridia- Both are exonephric

B
Typhlosole- Helps in grinding the soil particles and decaying leaves

C
Hepatic caeca- Blind tubules present at the junction of foregut and mid-gut in the alimentary canal of the cockroach

D
Gizzard- Internal median fold present in the dorsal wall of the intestine of earthworm

Solution

(i) Septal nephridia and pharyngeal nephridia- Both are exonephric
(ii) Typhlosole- Internal median fold present in the dorsal wall of the intestine of earthworm, meant to increase the absorpton surface area
(iii)Hepatic caeca- Blind tubules present at the junction of foregut and mid-gut in the alimentary canal of the cockroach
(iv) Gizzard- Helps in grinding the soil particles and decaying leaves
Question 9
4 / -1

Which of the following layers you will find in the body wall of earthworm (from outside to inside)?

A
Non-cellular cuticle, epidermis, circular muscles, longitudinal muscles, coelomic epithelium

B
Cuticle, epidermis, longitudinal muscles, circular muscles, coelomic epithelium

C
Non-cellular cuticle, epidermis, coelomic epithelium, circular muscles, longitudinal muscles

D
Cuticle, epidermis, peritoneal muscles

Solution

Externally the body wall of earthworm is covered by a thin non cellular cuticle below which lies the epidermis two muscle layers (circular and longitudinal) and innermost coelomic epithelium.
Question 10
4 / -1

Match column I with column II and select the correct option from the codes given below:

A
A- (i); B- (ii); C- (iii); D- (iv); E- (v); F- (vi); G- (vii)

B
A- (i); B- (ii); C- (iii); D- (v); E- (iv); F- (vi); G- (vii)

C
A- (i); B- (iii); C- (ii); D- (iv); E- (v); F- (vii); G- (vi)

D
A- (i); B- (iii); C- (ii); D- (v); E- (iv); F- (vii); G- (vi)

Solution

(A) Buccal cavity: 1-3
(B) Pharynx: 3-4
(C) Oesophagus: 5-7
(D) Gizzard: 8-9
(E) Stomach: 9-14
(F) Intestine: 15 to last
(G) Typhlosole: 26-35
So, the correct answer is
'A- (i); B- (ii); C- (iii); D- (iv); E- (v); F- (vi); G- (vii)'.
Question 11
4 / -1

Given is the figure of alimentary canal of earthworm. Select the option that correctly identifies the parts labelled as A to E

A
A-Pharynx, B-Stomach, C-Caecum, D-Gizzard, E-Lymph gland

B
A-Gizzard, B-Pharynx, C-Stomach, D-Caecum, E-Lymph gland

C
A-Pharynx, B-Gizzard, C-Stomach, D-Caecum, E-Lymph gland

D
A-Gizzard, B-Pharynx, C-Liver, D-Stomach, E-Villi

Solution

Alimentary canal of earthworm is a straight structure with variable diameter extending from anus and consisting of buccal cavity, pharynx, oesophage gizzard, stomach and intestine Pharynx is pear-se muscular, extends upto 4th segment, nervering is per on the anterior region in groove between buccal chas and pharynx. Gizzard is oval, most muscular part by internal cuticle. It triturates (grinds) ingested food extends upto segment 8^th. Stomach is a narrow,gland and vascular tube extending from segment 9-14 sphincter is present between gizzard and stomach between stomach and intestine.
Lymph glands occur in each of the segment 26 and to behind it. There are two small, whitish glands one ones side of dorsal blood vessel. They are believed to gerer
phagocytic cells.
Question 12
4 / -1

Which part of the alimentary canal of earthworm (in the given figure) helps in grinding the soil particles?

A
A

B
B

C
C

D
D

Solution

Part labelled as 'C' is gizzard which helps in grinding the soil particles in earthworm
Question 13
4 / -1

Primary function of enteronephric nephridia of Pheretima

A
Osmoregulation

B
Excretion of nitrogenous waste

C
Respiration

D
Locomotion

Solution

Septal nephridia and pharyngeal nephridia earthworm are enteronephric and thus excrete nitrogenous wastes into the lumen of alimentary canal/enteron
Question 14
4 / -1

Earthworm has no skeleton. During burrowing anterior end becomes turgid and acts as hydraulic skeleton. It is due to

A
Gut peristalsis

B
Setae

C
Coelomic fluid

D
Blood

Solution

Hydraulic skeleton is the system of support founded bodied invertebrates, which relies on the incompresse of fluids contained within the body cavity. In earthworms coelomic fluid is under pressure within the coelom and therefore provides support for internal organs. Due to hydraulic skeleton, during burrowing, the anterior end and aids in relaxation of longitudinal muscles
Question 15
4 / -1

In Pheretima, there are red coloured round bodies in 4^th, 5^th and 6^th segments above the alimentary canal. They are believed to be involved in

A
excretion

B
digestion

C
reproduction

D
leucocyte production

Solution

In Pheretima, the red coloured bodies found in 4^th, 5^th, 6^th segments above the alimentary canal are called blood glands. These glands serve for the manufacture of blood corpuscles (leucocytes) and haemoglobin. They are also believed to be excretory in nature.

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Re-Attempt Weekly Quiz Competition

Structural Organisation in Animals Test - 3

Result

Structural Organisation in Animals Test - 3

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Rank

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SHARING IS CARING

Question 1

sugarcane roots

decaying fallen leaves and soil organic matter

soil insects

small pieces of fresh fallen leaves of maize, etc

Solution

Question 2

Genital papillae are present in 17th and 19th segment

Male genital pores are present on 18th segment

Clitellum is present on segments 24, 25, 26

Segments of earthworm are called somites

Solution

Question 3

Four pairs of valves and are situated in segment 7 and 9

Four pairs of valves and are situated in segment 6 and 8

Three pairs of valves and are situated in segment 8 and 10

Two pairs of valves and are situated in segment 6 and 11

Solution

Question 4

dorsal

ventral

supra-oesophageal

lateral oesophageal

Solution

Question 5

Fertilization of eggs occurs inside the body

The typhlosole greatly increases the effective absorption area of the digested food in the intestine

The S-shaped setae embedded in the integument are the defensive weapons used against the enemies

It has a long dorsal tubular heart

Solution

Question 6

Clitellum - secretes cocoon

Gizzard - absorbs digested food

Setae - defence against predators

Typhlosole - storage of extra nutrients

Solution

Question 7

Salts

Haemoglobin

Corpuscles

Proteins

Solution

Question 8

Septal nephridia and pharyngeal nephridia- Both are exonephric

Typhlosole- Helps in grinding the soil particles and decaying leaves

Hepatic caeca- Blind tubules present at the junction of foregut and mid-gut in the alimentary canal of the cockroach

Gizzard- Internal median fold present in the dorsal wall of the intestine of earthworm

Solution

Question 9

Non-cellular cuticle, epidermis, circular muscles, longitudinal muscles, coelomic epithelium

Cuticle, epidermis, longitudinal muscles, circular muscles, coelomic epithelium

Non-cellular cuticle, epidermis, coelomic epithelium, circular muscles, longitudinal muscles

Cuticle, epidermis, peritoneal muscles

Solution

Question 10

A- (i); B- (ii); C- (iii); D- (iv); E- (v); F- (vi); G- (vii)

A- (i); B- (ii); C- (iii); D- (v); E- (iv); F- (vi); G- (vii)

A- (i); B- (iii); C- (ii); D- (iv); E- (v); F- (vii); G- (vi)

A- (i); B- (iii); C- (ii); D- (v); E- (iv); F- (vii); G- (vi)

Solution

Question 11

A-Pharynx, B-Stomach, C-Caecum, D-Gizzard, E-Lymph gland

A-Gizzard, B-Pharynx, C-Stomach, D-Caecum, E-Lymph gland

A-Pharynx, B-Gizzard, C-Stomach, D-Caecum, E-Lymph gland

A-Gizzard, B-Pharynx, C-Liver, D-Stomach, E-Villi

Solution

Question 12

A

B

C

D

Solution

Genital papillae are present in 17^th and 19^th segment

Male genital pores are present on 18^th segment