Multiple Choice QuestionsWhich of the following pairs are correctly matched?
Animals Morphological features
(i) Crocodile - 4-chambered heart
(ii) Sea urchin - Parapodia
(iii) Obelia - Thecodont
(iv) Lemur - Thecodont
A, C and D
B, C and D
Only A and D
Only A and D
What is true about Nereis, Scorpion, Cockroach and Silver fish?
They all have jointed paired appendages
They all possess dorsal heart
None of them is aquatic
None of them is aquatic
Areolar connective tissue joins
fat body with muscles
integument with muscles
bones with muscles
bones with muscles
Earthworms are
ureotelic when plenty of water is available
ureotelic when plenty of water is available
uricotelic under conditions of water scarcity
uricotelic under conditions of water scarcity
Select the correct route for the passage of sperms in male frogs :
Testes - Bidder's canal - Kidney - Vasa
efferentia - Urinogenital duct - Cloaca
Testes - Vasa efferentia - Kidney - Seminal
Vesicle - Urinogenital duct - Cloaca
Testes - Vasa efferentia - Bidder's canal -
Ureter - Cloaca
Testes - Vasa efferentia - Bidder's canal -
Ureter - Cloaca
MALT constitutes about ___________ percent of the lymphoid tissue in human body.
50%
20%
70%
70%
Receptor sites for neurotransmitters are present on
Membranes of synaptic vesicles
Pre-synaptic membrane
Tips of axons
Tips of axons
Myelin sheath is produced by
Schwann Cells and Oligodendrocytes
Astrocytes and Schwann Cells
Oligodendrocytes and Osteoclasts
Oligodendrocytes and Osteoclasts
Which one of the following in birds, indicates, their reptilian ancestry?
Scales on their hindlimbs
Four-chambered heart
Two special chambers crop and gizzard in their digestive tract
Eggs with a calcareous shell
C.
Two special chambers crop and gizzard in their digestive tract
Nearly a century ago TH Huxley called birds 'glorified reptiles' thereby meaning that birds have evolved from some reptilian ancestor. Both birds and reptiles lay the same type of eggs, which are deposited outside water. Eggs are large and telolecithal. The ovum is surrounded by albumen, an egg membrane and a thick hard calcareous shell, which are all secreted by special gland located int he walls of oviduct.
Birds like mammals have completely four chambered heart with double circulation, in which there is no mixing of pure and impure bloods. Whereas the ventricle is imperfectly divided in reptiles, resulting in partial mixing of bloods.
All birds have horny epidermal scales confined to the lower parts of their legs and feet, which are exactly like the epidermal scales of the reptiles. Besides birds are covered by feathers, which are homologous to the reptilian horny scales as they have a similar origin and develop from similar germ buds.
Six highly chitinous plate-like teeth are found in ……. of cockroach
Mandible
Gizzard
Mexilla
Rectum
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