Structural Organisation in Animals Test

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Structural Organisation in Animals Test - 80

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Question 1
1 / -0

Coelosepta are absent in earthworm

A
In clitellar segment

B
In $$1 ^{st}$$ four segments

C
Between $$9 ^{th}$$ and $$10 ^{th}$$ segment

D
Both B and C

Solution

Segmentation in earthworm is internal by coelosepta and this coelosepta is absent in the first four regions and between $$9^{th}$$ and $$10^{th}$$ segment. The clitellar is the ring or saddle-shaped region of glandular tissue in the body wall of certain annelids as earthworms and leeches. The clitellar is segmented by coelosepta.
Therefore, the correct answer is option D.
Question 2
1 / -0

Locomotion is directly helped by

A
Setae

B
Mucous secreted by body segments

C
Rhythmic contraction of body segments

D
Pharynx

Solution

The earthworm has segmented body which is known as metameric segments. Each segment has setae which are stiff hairs on each earthworm segment that extends and grips the surrounding soil as the worm's longitudinal muscles force fluid into the segment. As the segment contracts, the setae help push the worm forward, then retract until the next wave of expansion and contraction. So, the correct answer is option A.
Question 3
1 / -0

Gizzard in Pheretima is an organ

A
Secretes slime

B
For absorption of digested food

C
For excretion

D
For crushing food

Solution

In the 8th segment, the oesophagus dilates and modifies into a large, muscular oval shaped gizzard occupying 8th and 9th segments. The gizzard is made of circular muscles and is internally lined by a cuticle. It acts as a grinder. After the gizzard, the food is pushed to the intestine where it is finally broken down into simpler compounds. So, the correct answer is option D.
Question 4
1 / -0

Inner cuticle layer is present in alimentary canal of earthworm is in

A
Pharynx

B
Gizzard

C
Intesline

D
Stomach

Solution

In the 8th segment, the oesophagus dilates and modifies into a large, muscular oval shaped gizzard occupying 8th and 9th segments. The gizzard is made of circular muscles and is internally lined by a cuticle. It acts as a grinder. After the gizzard, the food is pushed to the intestine where it is finally broken down into simpler compounds. So, the correct answer is option B.
Question 5
1 / -0

Chloragogen cells of Pheretima have similar function like the vertebrate

A
Kidney

B
Malpighian corpuscle

C
Liver

D
Lungs

Solution

Chloragogen cells of Pheretima, earthworms are yellowish appearing organelles. They store glycogen and have a role in neutralizing toxins similar to the way vertebrate liver does.
So, the correct option is 'Liver'.
Question 6
1 / -0

Chloragogen cells of Pheretima are similar to human

A
Heart

B
Liver

C
Stomach

D
Kidney

Solution

Chloragogen cells of annelids are similar to the liver in vertebrates. These cells are yellowish in color and store glycogen and neutralize toxins.
So, the correct answer is option B.
Question 7
1 / -0

Typhlosole in earthworm begins from ........... segment.

A
15$$^{th}$$

B
9$$^{th}$$

C
26$$^{th}$$

D
27$$^{th}$$

Solution

A typhlosole is an internal fold of the intestine or the intestinal wall it runs along most of its length, effectively forming a tube within a tube and increasing the absorption area by that of its inner surface. In earthworm, it begins from the 26th segment. So, the correct answer is option C.
Question 8
1 / -0

Which cells secretes wax located at the outer surface of body wall?

A
Trophocytes

B
Oenocytes

C
Trichogen

D
Mycetocytes

Solution

Oenocytes are insect cells which involve in the lipid processing and detoxification of fat present in close association with the insect epidermis. They contain lipids that participating in the wax synthesis and hence secrete wax at the outer surface of the body wall.
So, the correct answer is option B.
Question 9
1 / -0

In cockroach, food is crushed in which part of the body?

A
Crop

B
Gizzard

C
Mesenteron

D
Oesophagus
Solution
- The gizzard grinds food one more time before it enters the stomach. The crop opens into a short, muscular organ, the gizzard where the grinding of food takes place.
- Crop holds swallowed food until a toothy section of the digestive tract called the proventriculus, can pulverize it.
- Mesenteron also called the midgut functions mainly for digestion. It is lined with enzyme-secreting tissue and serves as the main site of digestion and absorption.
- The oesophagus is also called the gullet, is the part of the gastrointestinal system between the mouth and the stomach. It connects the pharynx and the stomach. The oesophagus can contract or expand to allow for the passage of food.
So, the correct answer is option B.
Question 10
1 / -0

In which part of alimentary canal of cockroach is the invagination of cuticle found?

A
Anterior part

B
In midpart

C
In posterior part

D
Both in anterior and posterior part

Solution

The alimentary canal of cockroach is a long, muscular and tubular structure that extends from mouth to anus. Both in anterior and posterior part of the alimentary canal of cockroach, the invagination of the cuticle is found. Anterior invagination of ectoderm forms foregut. Posterior invagination of ectoderm forms hindgut.
Thus, the correct answer is option D.

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Re-Attempt Weekly Quiz Competition

Structural Organisation in Animals Test - 80

Result

Structural Organisation in Animals Test - 80

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SHARING IS CARING

Question 1

In clitellar segment

In $$1 ^{st}$$ four segments

Between $$9 ^{th}$$ and $$10 ^{th}$$ segment

Both B and C

Solution

Question 2

Setae

Mucous secreted by body segments

Rhythmic contraction of body segments

Pharynx

Solution

Question 3

Secretes slime

For absorption of digested food

For excretion

For crushing food

Solution

Question 4

Pharynx

Gizzard

Intesline

Stomach

Solution

Question 5

Kidney

Malpighian corpuscle

Liver

Lungs

Solution

Question 6

Heart

Liver

Stomach

Kidney

Solution

Question 7

15$$^{th}$$

9$$^{th}$$

26$$^{th}$$

27$$^{th}$$

Solution

Question 8

Trophocytes

Oenocytes

Trichogen

Mycetocytes

Solution

Question 9

Crop

Gizzard

Mesenteron

Oesophagus

Solution

Question 10

Anterior part

In midpart

In posterior part

Both in anterior and posterior part

Solution

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