Morphology of Cockroach Practice Questions
18 free Morphology of Cockroach practice questions for the NCERT Biology. Tap an option to answer — you get instant feedback, the correct answer, and a detailed explanation for every question.
The body of a cockroach is divided into how many main regions?
- A 2
- B 3
- C 4
- D 5
Correct answer: 3
The cockroach body is divided into head, thorax, and abdomen. This segmentation is typical of insects.
Which part of the cockroach body bears the antennae?
- A Thorax
- B Abdomen
- C Head
- D Legs
Correct answer: Head
The head region bears a pair of long antennae. These are sensory organs used for detecting environmental stimuli.
How many pairs of legs are present in a cockroach?
- A 2
- B 4
- C 5
- D 3
Correct answer: 3
Cockroaches have three pairs of legs attached to the thorax. This is a characteristic feature of insects.
Which part of the cockroach body is responsible for locomotion?
- A Head
- B Abdomen
- C Eyes
- D Thorax
Correct answer: Thorax
The thorax bears legs and wings. It is responsible for movement and locomotion.
The outer covering of cockroach is made up of:
- A Cellulose
- B Keratin
- C Silica
- D Chitin
Correct answer: Chitin
The exoskeleton of cockroach is made of chitin. It provides protection and support.
Which type of mouthparts are present in cockroach?
- A Piercing and sucking type
- B Sponging type
- C Biting and chewing type
- D Siphoning type
Correct answer: Biting and chewing type
Cockroaches have biting and chewing mouthparts. These help in feeding on a variety of materials.
Which structure helps cockroach in sensing touch and smell?
- A Eyes
- B Mandibles
- C Antennae
- D Wings
Correct answer: Antennae
Antennae are sensory organs that detect touch and smell. They are highly sensitive.
How many pairs of wings are present in a cockroach?
- A One
- B Three
- C Four
- D Two
Correct answer: Two
Cockroaches have two pairs of wings. The forewings are leathery and hindwings are membranous.
Which part of the cockroach body contains 10 segments?
- A Head
- B Thorax
- C Abdomen
- D Antennae
Correct answer: Abdomen
The abdomen consists of 10 segments. It contains various organs and reproductive structures.
Which structure is present at the end of the abdomen in cockroach?
- A Cerci
- B Wings
- C Antennae
- D Mandibles
Correct answer: Cerci
Cerci are paired appendages at the end of the abdomen. They are sensory in function.
The thorax of cockroach is divided into how many segments?
- A 3
- B 2
- C 4
- D 5
Correct answer: 3
The thorax has three segments: prothorax, mesothorax, and metathorax. Each segment bears a pair of legs.
Which part of cockroach bears compound eyes?
- A Thorax
- B Abdomen
- C Head
- D Legs
Correct answer: Head
The head bears a pair of compound eyes. These provide a wide field of vision.
Which type of symmetry is shown by cockroach?
- A Bilateral symmetry
- B Radial symmetry
- C Asymmetry
- D Spherical symmetry
Correct answer: Bilateral symmetry
Cockroach exhibits bilateral symmetry. Its body can be divided into two equal halves along one plane.
Which structure protects the hindwings in cockroach?
- A Tegmina
- B Cerci
- C Mandibles
- D Antennae
Correct answer: Tegmina
The tegmina (forewings) protect the delicate hindwings. They are thick and leathery.
Which appendages are present on each abdominal segment?
- A Legs
- B Wings
- C Cerci
- D None
Correct answer: None
Abdominal segments generally lack appendages except the last segment. Cerci are present only at the end.
Which of the following is a locomotory organ in cockroach?
- A Cerci
- B Antennae
- C Six legs
- D Mandibles
Correct answer: Six legs
Legs are the main locomotory organs. They help in walking and running.
Which feature of the cockroach's body wall helps it survive in a wide range of habitats?
- A A soft, permeable body wall that loses water rapidly in dry surroundings
- B A chitinous exoskeleton joined by flexible arthrodial membranes
- C An internal bony skeleton that supports the body from within
- D A calcified shell that cannot be moulted as the insect grows
Correct answer: A chitinous exoskeleton joined by flexible arthrodial membranes
The cockroach is covered by a hard chitinous exoskeleton, but successive segments are joined by thin, flexible arthrodial membranes. The plates protect the insect and cut down water loss, while the membranes still allow free movement and moulting, so it copes with habitats ranging from damp drains to dry kitchens.
Which part of cockroach is involved in feeding?
- A Antennae
- B Mouthparts
- C Cerci
- D Flight wings
Correct answer: Mouthparts
Mouthparts like mandibles help in biting and chewing food. They are adapted for omnivorous feeding.