Assertion: Blood in cockroach is colourless haemolymph with no respiratory pigment.

Reason: Respiration in cockroach occurs through diffusion in haemolymph.

• If both assertion and reason are true and reason is the correct explanation of assertion

• If both assertion and reason are true but reason is not the correct explanation of assertion

• If assertion is true but reason is false

• If both assertion and reason are false.

During the life-cycle, Fasciola hepatica (liver fluke) infects its intermediate host and primary host at the following larval stages respectively

• redia and miracidium

• cercaria and redia

• metacercaria and cercaria

• miracidium and metacercaria.

153.

Which of the following does not come under the Class Mammals?

• Flying fox

• Hedgehog

• Manatee

• Lamprey

Assertion: Cephalization is advantageous to an animal.

Reason: It improves the appearance of the animal

• If both assertion and reason are true and reason is the correct explanation of assertion

• If both assertion and reason are true but reason is not the correct explanation of assertion

• If assertion is true but reason is false

• If both assertion and reason are false.

Assertion : Torison can be seen in ctenidium.

Reason : Ctenidium acts as the respiratory organ.

• If both assertion and reason are true and reason is the correct explanation of assertion

• If both assertion and reason are true but reason is not the correct explanation of assertion

• If assertion is true but reason is false

• If both assertion and reason are false

Which one of the following animals is correctly matched with its one characteristic and the taxon

• Animal	Characteristic	Taxon
  Millipede	Ventral nerve cord	Arachnida

• Duckbill platypus

  Oviparous

  Mammalia

• Silverfish

  Pectoral and pelvic fin

  Chordata

• Sea anemone

  Triploblastic

  Cnidaria

All mammals without any exception are characterised by

• viviparity and biconcave red blood cells 

• extra-abdominal testes and a four chambered heart

• heterodont teeth and 12 pairs of cranial nerves

• a muscular diaphragm and milk producing
  glands.

Which one of the following pairs of the kind of cells and their secretion is correctly matched

• Oxyntic cells

  a secretion with pH between 2.0 and 3.0

• Alpha cells of islets of Langerhans

  secretion that decreases blood sugar level

• Kupffer cells

  a digestive enzyme that hydrolyses nucleic acids

• Sebaceous glands

  a secretion that evaporates for cooling

A lizard-like member of reptilia is sitting on a tree with its tail coiled around a twig. This animal could be

• Hemidactylus showing sexual dimorphism

• Varamus showing mimicry

• garden lizard (Calotes) showing camouflage

• Chamaeleon showing protective colouration

Which one of the following features is common in silverfish, scorpion, dragonfly and prawn?

• Two pairs of legs and segmented body

• Living chitinous cuticle and two pairs of antennae

• Jointed appendages and chitinous exoskeleton

• Closed blood carcular system