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Structural Organisation in Animals · Question 82

AIPMT 2003MCQEasy📈 Topic in 62% papers+4−1
1

Ommatidia serve the purpose of photoreception in

  1. cockroach
  2. frog
  3. humans
  4. sunflower.

Answer

(1) cockroach

Solution

Ommatidia are the visual units of the compound eyes of insects.

As per NCERT, each compound eye of the cockroach consists of about 2000 hexagonal ommatidia; with their help a cockroach receives several images of an object (mosaic vision).

∴ Ommatidia serve photoreception in the cockroach.

Answer: (1)

AIPMT 2003

Keep practising — Structural Organisation in Animals

2

Which one of the following contains the largest quantity of extracellular material ?

  1. Stratified epithelium
  2. Myelinated nerve fibres
  3. Striated muscle
  4. Areolar tissue
AIPMT 2003
3

Which cartilage is present at the end of long bones?

  1. Calcified cartilage
  2. Hyaline cartilage
  3. Elastic cartilage
  4. Fibrous cartilage
AIPMT 2002
4

Melanin protects from:

  1. Infrared rays
  2. U.V. rays
  3. Visible rays
  4. X-rays
AIPMT 2002
5

During an injury, the nasal septum gets damaged. For its recovery, which cartilage is preferred?

  1. Fibrous cartilage
  2. Elastic cartilage
  3. Calcified cartilage
  4. Hyaline cartilage
AIPMT 2001
6

Which cells do not form a layer and remain structurally separate?

  1. Nerve cells
  2. Epithelial cells
  3. Gland cells
  4. Muscle cells
AIPMT 2001
7

What happens if bone of frog is kept in dilute hydrochloric acid?

  1. Will become flexible
  2. Will turn black
  3. Will break into pieces
  4. Will shrink
AIPMT 2000
8

Proteoglycan in cartilages which is part of polysaccharide is

  1. Ossein
  2. Cartilegen
  3. Chondroitin
  4. Casein
AIPMT 2000
9

Characteristic of simple epithelium is that they

  1. Continue to divide and help in organ function
  2. They are arranged indiscriminately
  3. They make a definite layer
  4. None
AIPMT 2000
10

Primary function of enteronephric nephridia of Pheretima:

  1. Excretion of nitrogenous waste
  2. Locomotion
  3. Osmoregulation
  4. Respiration
AIPMT 2000

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