Which among the following difference is incorrect between bone and cartilage ?

Option  

Bone

Cartilage

1.

Hard and pliable

Solid and non-pliable

2.

Composed of osteocytes

Composed of chondrocytes

3.

Present in spaces called as lacunae

Enclosed in small cavities within matrix secreted by them

4.

In adults, bone > cartilage

In vertebrate embryo, cartilage > bone

Subtopic:  Connective Tissue |
 73%
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Complete the following analogy regarding reproductive system of cockroach :-

Testes : IV-VI abdominal segments : : Ovaries : ____ abdominal segments

(1) II-VI

(2) III-VI

(3) II-VIII

(4) IV-VI

Subtopic:  Cockroach: Female Reproductive System (OLD NCERT) |
 81%
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Complete the following analogy :-

Vertebrates : Brain : : Cockroach : ___________

(1) Lower-oesophageal ganglion

(2) Supra-oesophageal ganglion

(3) Nephrocytes

(4) Ommatidia

Subtopic:  Cockroach: Nervous System (OLD NCERT) |
 90%
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The hard chitinous exoskeleton of cockroach has sclerites which are called as:

Options  

Dorsally

Ventrally

(1)

sternites

tergites

(2)

Arthrodial membrane   

pleura

(3)

tergites

sternites

(4)

pleura

sternum

Subtopic:  Cockroach: Intro & External Morphology (OLD NCERT) |
 82%
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The triangular head of cockroach is made by fusion of how many segments :

(1) Three

(2) Five

(3) Nine

(4) Six

Subtopic:  Cockroach: Head & Mouth Parts (OLD NCERT) |
 80%
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Label A, B, C, D and E in the following figure :-

(1) Labium, mandible, hypopharynx, maxilla, labrum

(2) Labrum, hypopharynx, maxilla, mandible, labium

(3) Labrum, mandible, hypopharynx, maxilla, labium

(4) Labium, maxilla, hypopharynx, labium, mandible

Subtopic:  Cockroach: Head & Mouth Parts (OLD NCERT) |
 75%
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Which mouth part of cockroach has grinding and incising part ?

(1) Mandible

(2) Labium

(3) Mandible and maxilla

(4) Hypopharynx

Subtopic:  Cockroach: Head & Mouth Parts (OLD NCERT) |
 60%
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Which among the following statements with respect to forewings of cockroach is incorrect?

(1) They are called as tegmina.

(2) They are opaque, leathery and dark.

(3) They arise from prothorax.

(4) They cover hindwings when at rest.

Subtopic:  Cockroach: Structure of Thorax (OLD NCERT) |
 82%
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Which among the following statements are incorrect about cockroach?

(1) Haemocytes lack respiratory pigment.

(2) Has 13 chambered heart on the ventral side of the body.

(3) Blood from sinuses enter heart through ostia.

(4) Has 10 pairs of spiracles present on lateral side of body.

Subtopic:  Cockroach: Circulatory System (OLD NCERT) |
 71%
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Which among the following is incorrect regarding the vision of cockroach?

(1) Compound eyes are located at dorsal surface of head.

(2) They have nocturnal type of vision.

(3) Each eye consists of 3000 malpighian tubules.

(4) Their vision is known as mosaic vision with more sensitivity but less resolution.

Subtopic:  Cockroach: Compound Eye (OLD NCERT) |
 87%
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