Structural Organisation in Animals Test

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Structural Organisation in Animals Test - 94

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Weekly Quiz Competition

Question 1
1 / -0

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

A. The ova (eggs) are fertilised by the sperm cells within the cocoon which are deposited in the soil and not inside the body.
B. The characteristic feature of the intestine between 26-35 segments is the presence of internal median fold of dorsal wall called typhlosole. This increases the effective area of absorption in the intestine.
C. S-shaped' setae embedded in the epidermal pits in the middle of each segment serve the principal role of locomotion and not defence.
D. Earthworm possesses a segmented; not a long dorsal tubular heart.
So, the correct option is 'The typhlosole greatly increases the effective absorption area of the digested food in the intestine'.
Question 2
1 / -0

Jacobson's organ is?

A
Absent in Frog

B
Absent in humans

C
Present in humans

D
Vestigial in humans
Question 3
1 / -0

End plate junction is present between:

A
Neuron and striated muscle

B
Neuron and neuron

C
Muscle and muscle

D
Both B and C

Solution

End plate junction or neuromuscular junction, are specialized chemical synapses formed at the sites where terminal branches of a motor neuron is able to contact the target muscle cell (skeletal muscle) and is achieved by the secretion of acetylcholine.
Thus, the correct option is "neuron and striated muscle".
Question 4
1 / -0

Pseudostratified epithelium occurs in

A
Oesophageal wall

B
Bronchiole lining

C
Urinary bladder wall

D
Rectal wall

Solution

The lining of oesophageal and rectal wall are covered by stratified squamous epithelium, while the wall of urinary bladder is lined by transitional epithelium.
Ciliated pseudostratified columnar epithelia are found in the linings of the trachea as well as the upper respiratory tract. They function to keep the nasal passage free of irritant particles by trapping them.
So, the correct answer is B.
Question 5
1 / -0

Match the following. Identify the correct match between Set-I and Set-II.
Set-I Set-II
A) Caloreceptors I) Cold receptors
B) Proprioceptors II) Body surface receptors
C) Frigidoreceptors III) Heat receptors
D) Exteroceptors IV) Receptors found in muscles

A
A- I, B- II, C- III, D- IV

B
A- III, B- IV, C- I, D- II

C
A- IV, B- III, C- II, D- I

D
A- III, B- IV, C- II, D- I

Solution

There are various receptors present in the human body like caloreceptors, proprioreceptors, frigidoreceptors, exteroceptors, rheoreceptors, baroreceptors, etc. Caloreceptors are heat receptors. Frigidoreceptors are cold receptors. Proprioceptors are muscle position receptor. These are receptors found in muscles. Exteroceptors are found on body surface.
Thus, the correct answer is option B.

Question 6

1 / -0

Match the terms in column I with those in column II

	LIST I		LIST II
A	Compound eye	1	Alimentary canal
B	Septal nephridia	2	Cockroach
C	Open circulatory system	3	Mosaic vision
D	Typhiosole	4	Phallomere
E	Genitalia	5	Earthworm

A - 3, B - 5, C - 2, D - 1, E - 4

A - 5, B - 3, C - 4, D - 1, E - 2

A - 3, B - 5, C - 1, D - 2, E - 4

A - 5, B - 2, C - 3, D - 1, E - 4

Solution

1. The compound eye of cockroach consists of ommatidia, which form their separate image resulting into mosaic vision. The image so formed is incapable of distinct vision and blurred.

2. Nephridia are present as the excretory organs of earthworm which excrete urea out of the body.

3. Open circulatory system is present in cockroach where blood does not flow through distinct vessels but pumped through the haemocele.

4. Thyphlosole is present in the alimentary canal and increases the area of intestinal absorption.

5. The genitalia of cockroach is represented by phellomere of an insect that serves in copulation, oviposition, or stinging.

So, the correct option is 'A - 3, B - 5, C - 2, D - 1, E - 4'.

Question 7
1 / -0

Choose the correct answer from the allternatives given.
What is the anterior pair of wings called in cockroach?

A
Sternum

B
Elytra

C
Tergum

D
Cerci

Solution

Answer B: Elytra.
The anterior pair of wings in a cockroach is Elytra.
Question 8
1 / -0

Choose the correct answer from the allternatives given.
How many pairs of spiracles are found in cockroach?

A
2 pairs in thorax and 8 pairs in abdomen

B
1 pair in thorax and 8 pairs in abdomen

C
2 pairs in thorax and 6 pairs in abdomen

D
3 pairs in thorax and 8 pairs in abdomen

Solution

Answer A: 2 pairs in the thorax and 8 pairs in the abdomen.
A cockroach has a total of 10 pairs i.e. 20 spiracles in all. These are organized as 2 pairs of thoracic spiracles and 8 pairs of abdominal spiracles.
Question 9
1 / -0

The body cells in cockroach discharge their nitrogenous waste in the haemolymph mainly in the form of

A
Ammonia

B
Potassium urate

C
Urea

D
Calcium carbonate
Solution
Correct Answer: B
Explanation:
A cockroach is ureotelic in nature because it releases uric acid as an excretory waste.
The insect produces soluble potassium urate as a nitrogenous waste product.
It is liberated in the hemolymph.
The urate is picked up by glandular cells present in the Malpighian tubules.
Inside the Malpighian tubules, it is converted into uric acid through various biological processes and then poured into ileum for elimination along with fecal matter
Hence, the correct answer is Potassium urate.
Question 10
1 / -0

In cockroach the flow of haemolymph is

A
Heart -> head haemocoel --> perivisceral sinus -->pericardial sinus -->ostia

-->heart

B
Heart -->pericardial sinus--> head haemocoel --> perivisceral sinus--> ostia -->heart

C
Heart -->head haemocoel -> previsceral sinus -->ostia -->pericardial sinus -->heart

D
Heart -->ostia -> perivisceral sinus -->pericardial sinus -> head haemocoel

-->heart

Solution

The circulation of haemolymph in cockroach is as follows :
1. The blood flows forward in the heart by the contractions of its chambers.
2. At the anterior end of the heart, the blood flows into the aorta and from there it enters the sinus of the head.
3. From the head sinus , the blood flows into the perivisceral and sternai sinuses.
4. On contraction of the alary muscles the pericardial septum is pulled down. This increases the volume of the pericardial sinus. Hence, blood flows from the perivisceral sinus into the pericardial sinus.
5. On relaxation of the alary muscles, the pericardial septum moves upwards to its original position. This forces the blood, to enter the chambers of the heart through the ostia from the pericardial sinus.
So, the correct option is 'Heart -> head haemocoel --> perivisceral sinus -->pericardial sinus -->ostia -->heart'.

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Set-I	Set-II
A) Caloreceptors	I) Cold receptors
B) Proprioceptors	II) Body surface receptors
C) Frigidoreceptors	III) Heat receptors
D) Exteroceptors	IV) Receptors found in muscles

Structural Organisation in Animals Test - 94

Result

Structural Organisation in Animals Test - 94

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SHARING IS CARING

Question 1

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 2

Absent in Frog

Absent in humans

Present in humans

Vestigial in humans

Question 3

Neuron and striated muscle

Neuron and neuron

Muscle and muscle

Both B and C

Solution

Question 4

Oesophageal wall

Bronchiole lining

Urinary bladder wall

Rectal wall

Solution

Question 5

A- I, B- II, C- III, D- IV

A- III, B- IV, C- I, D- II

A- IV, B- III, C- II, D- I

A- III, B- IV, C- II, D- I

Solution

Question 6

A - 3, B - 5, C - 2, D - 1, E - 4

A - 5, B - 3, C - 4, D - 1, E - 2

A - 3, B - 5, C - 1, D - 2, E - 4

A - 5, B - 2, C - 3, D - 1, E - 4

Solution

Question 7

Sternum

Elytra

Tergum

Cerci

Solution

Question 8

2 pairs in thorax and 8 pairs in abdomen

1 pair in thorax and 8 pairs in abdomen

2 pairs in thorax and 6 pairs in abdomen

3 pairs in thorax and 8 pairs in abdomen

Solution

Question 9

Ammonia

Potassium urate

Urea

Calcium carbonate

Solution

Question 10

Heart -> head haemocoel --> perivisceral sinus -->pericardial sinus -->ostia -->heart

Heart -->pericardial sinus--> head haemocoel --> perivisceral sinus--> ostia -->heart

Heart -->head haemocoel -> previsceral sinus -->ostia -->pericardial sinus -->heart

Heart -->ostia -> perivisceral sinus -->pericardial sinus -> head haemocoel -->heart

Solution

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Heart -> head haemocoel --> perivisceral sinus -->pericardial sinus -->ostia

-->heart

Heart -->ostia -> perivisceral sinus -->pericardial sinus -> head haemocoel

-->heart