Animal Kingdom — Page 3 | NEET Biology

Q21

If the head of cockroach is removed, it may live for few days because

A the cockroach does not have nervous system.

B the head holds a small proportion of a nervous system while the rest is situated along the ventral part of its body.

C the head holds a

1 / 3^{\text{rd }}

of a nervous system while the rest is situated along the dorsal part of its body.

D the supra-oesophageal ganglia of the cockroach are situated in ventral part of abdomen.

Correct Answer

Option B

Solution

(b) Cockroaches breathe passively through a network of pipes connected to holes called spiracles along the length of their body.

Q22

Which one of the following groups of animals is correctly matched with its one characteristic feature without even a single exception?

A Reptilia : possess 3 - chambered heart

B Chordata : possess a mouth with jaw

C Chondrichthyes : possess cartilagious endoskeleton

D Mammalia : give birth to young one.

Correct Answer

Option C

Solution

(c) Chondrichthyes have cartilaginous skeleton

Q23

Which among these is the correct combination of aquatic mammals?

A Dolphins, Seals, Trygon

B Whales, Dolphins, Seals

C Trygon, Whales, Seals

D Seals, Dolphins, Sharks

Correct Answer

Option B

Solution

(b) Sharks and Trygon are cartilaginous fish

Q24

If the head of cockroach is removed, it may live for few days because

A the cockroach does not have nervous system.

B the head holds a small proportion of a nervous system while the rest is situated along the ventral part of its body.

C the head holds a

1 / 3^{\text{rd }}

of a nervous system while the rest is situated along the dorsal part of its body.

D the supra-oesophageal ganglia of the cockroach are situated in ventral part of abdomen.

Correct Answer

Option B

Solution

(b) Cockroaches breathe passively

Q25

What is common in Whale, Bat and Rat?

A Absence of neck

B Muscular diaphragm between thorax and abdomen

C Testes outside abdominal cavity

D Presence of external ears

Correct Answer

Option B

Solution

(b) Diaphragm present in all mammals

Q26

All chordates possess

A exoskeleton

B limbs

C skull

D axial skeletal rod of notochord

Correct Answer

Option D

Solution

(d) All chordates possess notochord at some stage of life

Q27

Sound box of birds is called

A pygostyle

B larynx

C syrinx

D synsacrum

Correct Answer

Option C

Solution

(c) Sound box or syrinx present below trachea in birds

Q28

An egg laying mammal is

A Kangaroo

B Platypus

C Koala

D Whale

Correct Answer

Option B

Solution

(b) Prototherians are egg laying mammals like Platypus

Q29

Metamorphosis of insects is regulated through hormone

A pheromone

B thyroxine

C ecdysone

D all the above

Correct Answer

Option C

Solution

(c) Metamorphosis of insects regulated through ecdysone hormone

Q30

True coelom is the space lying between the alimentary canal and body wall enclosed by the layers of

A ectoderm on both sides

B endoderm one side and ectoderm other

C mesoderm one side and ectoderm other

D mesoderm on both sides

Correct Answer

Option D

Solution

(d) Coelom lined by parietal and visceral peritoneum both mesoderm