Structural Organisation in Animals Test

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Structural Organisation in Animals Test - 59

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Weekly Quiz Competition

Question 1
1 / -0

Lateral hearts of Earthworm have

A
Two pairs of valves, segments 6 and 11

B
Three pairs of valves, segments 8 and 10

C
Four pairs of valves, segments 7 and 9

D
Four pairs of valves segments 6 and 8

Solution

In earthworm, four pairs of the heart are situated in 7, 9, 12 & 13 segments. Heart of 7 th & 9th called lateral heart having 4 pairs of valves while the heart of 12th & 13th called lateral oesophageal heart having 3 pairs of valves.
So, the correct answer is 'Four pairs of the valve, segments 7 and 9'.
Question 2
1 / -0

Statement (S): Respiratory system of Periplaneta is polyneustic type
Reason (R). In Periplaneta thoracic spiracles help in expiration and abdominal spiracles help in inspiration.

A
S is correct but R is wrong

B
S is wrong but R is correct

C
Both S and R are correct and R is correct explanation of S

D
Both S and R are correct and R is not correct explanation of S
Question 3
1 / -0

Head of Cockroach lacks ___________.

A
Cardo

B
Gena

C
Frons

D
Trochanter

Solution

Cardo: Cardo is the basal segment that joins the head cavity of the cockroach to its secondary jaws, also known as the maxillae.
Gena: The cheek or gena forms the sclerotized area on each side of the head below the compound eyes extending to the gular suture. Like many of the other parts making up the insect's head, the gena varies among species, with its boundaries difficult to establish.
Frons: The Frons is that part of the head capsule that lies ventrad or anteriad of the vertex. The Frons varies in size relative to the insect, and in many species, the definition of its borders is arbitrary, even in some insect taxa that have well-defined head capsules.
Trochanter: The trochanter is an anatomical portion of the femur near its joint with the hip bone. The trochanter is the second (as counted from the body of the insect) segment in the leg of an insect and is located between the coxa and the femur.
So, the answer is 'Trochanter'.
Question 4
1 / -0

Through mosaic vision, a Cockroach can receive

A
Several images of an object with more sensitivity but less resolution

B
Only one image of an object with more sensitivity but less resolution

C
Several images of an object with less sensitivity but more resolution

D
Only one image of an object with less sensitivity but more resolution

E
Only one image of an object with less sensitivity but less resolution

Solution

Cockroach, with the help of several ommatidia, receives several images of objects lying side by side. The images are of very less resolution. This kind of vision is called mosaic vision. In this way, the compound eye of cockroach is adapted to detect movements more efficiently.
So, the correct answer is 'Several images of an object with more sensitivity but less resolution'.
Question 5
1 / -0

Which is correct about respiration in Earthworm ____________________.

A
$$O_2$$ from atmosphere diffuses into blood and combines with haemoglobin of blood plasma

B
Blood does not have any important role in $$O_2$$ transport

C
Respires anaerobically

D
$$O_2$$ diffused from air combines with haemoglobin of RBCs

Solution

Answer is option A i.e. "$$O_2$$ from atmosphere diffuses into blood and combines with hemoglobin of blood plasma"
In Earthworm, oxygen is absorbed passively through their moist skin (which makes it permeable for oxygen to diffuse in and carbon dioxide to diffuse out). This oxygen from atmosphere is then picked up by the hemoglobin dissolved in the blood plasma and eventually carbon dioxide is released.
Question 6
1 / -0

Maximum number of ganglia are present in Cockroach in ______________.

A
Neck

B
Thorax

C
Abdomen

D
Head

Solution

Cockroach (Periplaneta americana) has in total 9 ganglia in number.Out of these ganglia, 3 are present in the thorax and 6 are present in the abdomen.These six ganglia are present in the 1st,2nd,3rd,4th,5th and 7th segment of the nervous system of the cockroach.Each ganglion of the nerve cord is formed by the fusion of two ganglia except the ganglion in the 7th segment. The ganglion in the 7th abdominal segment is the largest of all the abdominal ganglia and probably formed by the fusion of 3 pairs of ganglia.
So, the correct answer is 'Abdomen'.
Question 7
1 / -0

Adjacent ommatidia do not interfere in the images due to presence of ______________.

A
Pigmented cells

B
Retinulae

C
Vitrillae

D
Corneagen cells

Solution

Answer is option A i.e. "Pigmented cells"
Ommatidium are the optical units that make up the compound eye of an insect. Pigment cells are located between two adjacent ommatidia. Pigmented cells serve to isolate one ommatidium from the next thus preventing interferance in the images.
Question 8
1 / -0

Endocrine glands of Cockroach which secrete gonadotropic hormone is ________________.

A
Corpora allata

B
Corpora cardiaca

C
Prothoracic glands

D
Intercerebral glands
Solution
Option C is correct here.
The prothoracic glands are either of a pair of endocrine glands located in the prothorax of cockroach.
Ecdyson is the gonadotropic hormone of insect which induce molting in insects. When cockroach come to the age of molting brain secrete signal this signal come to the corpora allata.
Corpora allata secrete prothoracicotropic hormone(PTTH). This PTTH goes to prothocicotropic gland.
Prothoracicotropic gland get activate and secrete gonadotropic or steroidal hormone Ecdyson. Ecdyson induce molting of insects.
Question 9
1 / -0

Number of crushing teeth present in the gizzard of Cockroach is

A
Two

B
Three

C
Four

D
Six

Solution

The buccal cavity receives the common duct of salivary glands. The cockroach has a pair of salivary glands. Saliva contains amylase which converts starch into sugar.
The oesophagus is short in the length tabular structure while the crop is a large pear-shaped structure. But both are thin-walled structure.
The gizzard is a small, rounded thick walled with muscular chitins lining structure. It has six teeth. These teeth are sharp to grind the food. Gizzard masticates the food.
So the correct answer is 'Six'.
Question 10
1 / -0

Characteristic odour of Cockroach is produced by _____________.

A
Dermal glands

B
Stink glands

C
Trichogen glands

D
Both A and B

Solution

Answer is option B i.e. "Stink glands"
Stink gland of cockroach are present in between 5th and 6th tergum (abdomen region), it produce characteristic smell. This odor helps them to repel the enemies.

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Re-Attempt Weekly Quiz Competition

Structural Organisation in Animals Test - 59

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Structural Organisation in Animals Test - 59

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SHARING IS CARING

Question 1

Two pairs of valves, segments 6 and 11

Three pairs of valves, segments 8 and 10

Four pairs of valves, segments 7 and 9

Four pairs of valves segments 6 and 8

Solution

Question 2

S is correct but R is wrong

S is wrong but R is correct

Both S and R are correct and R is correct explanation of S

Both S and R are correct and R is not correct explanation of S

Question 3

Cardo

Gena

Frons

Trochanter

Solution

Question 4

Several images of an object with more sensitivity but less resolution

Only one image of an object with more sensitivity but less resolution

Several images of an object with less sensitivity but more resolution

Only one image of an object with less sensitivity but more resolution

Only one image of an object with less sensitivity but less resolution

Solution

Question 5

$$O_2$$ from atmosphere diffuses into blood and combines with haemoglobin of blood plasma

Blood does not have any important role in $$O_2$$ transport

Respires anaerobically

$$O_2$$ diffused from air combines with haemoglobin of RBCs

Solution

Question 6

Neck

Thorax

Abdomen

Head

Solution

Question 7

Pigmented cells

Retinulae

Vitrillae

Corneagen cells

Solution

Question 8

Corpora allata

Corpora cardiaca

Prothoracic glands

Intercerebral glands

Solution

Question 9

Two

Three

Four

Six

Solution

Question 10

Dermal glands

Stink glands

Trichogen glands

Both A and B

Solution

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