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Structural Organisation in Animals · Question 58

AIPMT 2012 (Prelims)MCQMedium📈 Topic in 62% papers+4−1
1

Select the correct statement from the ones given below with respect to Periplaneta americana

  1. Males bear a pair of short thread like anal styles
  2. There are 16 very long Malpighian tubules present at the junctions of midgut and hindgut
  3. Nervous system located dorsally, consists of segmentally arranged ganglia joined by a pair of longitudinal connectives
  4. Grinding of food is carried out only by the mouth parts

Answer

(1) Males bear a pair of short thread like anal styles

Solution

As per NCERT, in cockroach both sexes have a pair of jointed filamentous anal cerci, and males bear a pair of short, thread-like anal styles which are absent in females. ⇒ (1) is correct.

(2) There are 100–150 yellow coloured thin filamentous Malpighian tubules at the junction of midgut and hindgut, not 16.

(3) The nervous system consists of a series of fused, segmentally arranged ganglia joined by paired longitudinal connectives on the ventral side, not dorsal.

(4) Food is ground by the gizzard (proventriculus), which has an outer layer of thick circular muscles and a thick inner cuticle forming six chitinous plates called teeth.

Answer: (1)

AIPMT 2012 (Prelims)

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2

Consider the following four statements (A–D) related to the common frog Rana tigrina, and select the correct option stating which ones are true (T) and which ones are false (F). Statements:

  1. A-T, B-F, C-F, D-T
  2. A-T, B-T, C-F, D-F
  3. A-F, B-F, C-T, D-T
  4. A-F, B-T, C-T, D-F
AIPMT 2011 (Mains)
3

Ureters act as urinogenital ducts in

  1. human males
  2. human females
  3. both male and female frogs
  4. male frogs
AIPMT 2011 (Mains)
4

The type of muscles present in our

  1. heart is involuntary and unstriated smooth muscles
  2. intestine is striated and involuntary
  3. thigh is striated and voluntary
  4. upper arm is smooth muscle and fusiform in shape.
AIPMT 2011 (Mains)
5

Frogs differ from humans in possessing :

  1. hepatic portal system
  2. paired cerebral hemispheres
  3. nucleated red blood cells
  4. thyroid as well as parathyroid
AIPMT 2011 (Mains)
6

The cells lining the blood vessels belong to the category of :

  1. Squamous epithelium
  2. Columnar epithelium
  3. Connective tissue
  4. Smooth muscle tissue
AIPMT 2011 (Mains)
7

Which one of the following structures in Pheretima is correctly matched with its function ?

  1. Gizzard - absorbs digested food
  2. Setae - defence against predators
  3. Typhlosole - storage of extra nutrients
  4. Clitellum - secretes cocoon
AIPMT 2011 (Mains)
8

The ciliated columnar epithelial cells in humans are known to occur in :

  1. Eustachian tube and stomach lining
  2. Bile duct and oesophagus
  3. Fallopian tubes and urethra
  4. Bronchioles and Fallopian tubes
AIPMT 2011 (Prelims)
9

One very special feature in the earthworm Pheretima is that :

  1. The S-shaped setae embedded in the integument are the defensive weapons used against the enemies
  2. It has a long dorsal tubular heart
  3. The typhlosole greatly increases the effective absorption area of the digested food in the intestine
  4. Fertilisation of eggs occurs inside the body
AIPMT 2011 (Prelims)
10

Which of the following is correctly stated as it happens in the common cockroach?

  1. Oxygen is transported by haemoglobin in blood
  2. The food is ground by mandibles and gizzard
  3. Nitrogenous excretory product is urea
  4. Malpighian tubules are excretory organs projecting out from the colon
AIPMT 2011 (Prelims)
11

The cells lining the blood vessels belong to the category of :

  1. Columnar epithelium
  2. Connective tissue
  3. Smooth muscle tissue
  4. Squamous epithelium
AIPMT 2010 (Prelims)

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