Which of the following statements is INCORRECT?

1. Cockroaches exhibit mosaic vision with less sensitivity and more resolution
2. A mushroom-shaped gland is present in the 6th-7th abdominal segments of male
3. A pair of spermatheca is present in the 6th segment of female cockroach
4. Female cockroach possesses sixteen ovarioles in the ovaries

Subtopic:  Cockroach: Compound Eye |
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From NCERT
NEET - 2019
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Which of the following statement is correct with reference to the cockroach eye?

1. Both eyes together consist of about 2000 hexagonal ommatidia

2. Its vision has more sensitivity but less resolution

3. Mosaic vision is not found due to diurnal habit

4. Compound eyes are situated at the vertex region of the head

Subtopic:  Cockroach: Compound Eye |
 76%
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Visual units that compose the compound eyes of 

insects are called

(1) Osphradia 

(2) Ommatidia

(3) Onchospheres

(4) Odontophore

Subtopic:  Cockroach: Compound Eye |
 95%
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The night vision of cockroach is 

(1) More sensitivity but less resolution

(2) Less sensitivity but more resolution 

(3) Both sensitivity and resolution are high

(4) Both sensitivity and resolution are low 

Subtopic:  Cockroach: Compound Eye |
 88%
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Choose the incorrect match with respect to total number of following structures in cockroach

1. Spiracles – 10 pairs

2. Gastric caeca – 6-8

3. Malpighian tubules – 100-150

4. Ommatidia – 2000

Subtopic:  Cockroach: Compound Eye |
 55%
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The central nervous system of cockroach includes

1. Brain and ganglionated dorsal nerve cord

2. Brain and ganglionated ventral nerve cord

3. Brain and hollow nerve cord

4. Dorsal solid nerve cord only

Subtopic:  Cockroach: Compound Eye |
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Sense organs of cockroach include

1. Compound eyes

2. Johnston's organ

3. Osphradium

4. Spiracles

Subtopic:  Cockroach: Compound Eye |
 91%
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Ommatidia serve the purpose of photoreception in:
1. Cockroach
2. Frog
3. Humans
4. Sunflower

Subtopic:  Cockroach: Compound Eye |
 94%
From NCERT
AIPMT - 2003
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Given below are two statements: One is labelled as Assertion (A) and the other is labelled as Reason (R) . 

Assertion (A): With the help of several ommatidia, a cockroach can perceive several images of an object, i.e., mosaic vision 
Reason (R): Mosaic vision gives more sensitivity but less resolution 

 
In the light of the above statements, choose the most appropriate answer from the options given below: 

1. (A) is correct but (R) is not correct.
2. (A) is not correct but (R) is correct.
3. Both (A) and (R) are correct and (R) is the correct explanation of (A).
4. Both (A) and (R) are correct but (R) is not the correct explanation of (A).


 

Subtopic:  Cockroach: Compound Eye |
From NCERT
NEET - 2022
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Assertion (A): The vision of cockroaches is called mosaic vision.
Reason (R): They have several ommatidia.
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. (A) is false, but (R) is true.
Subtopic:  Cockroach: Compound Eye |
From NCERT
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