Multiple Choice QuestionsWhich one of the following is the true description of an animal concerned?
Earthworm - The alimentary canal consists of a sequence of pharynx, oesophagus, stomach, gizzard and intestine.
Frog - Body divisible into three regions- head, neck and trunk
Rat - Left kidney is slightly higher in position that the right one
Rat - Left kidney is slightly higher in position that the right one
Which one of the following pair of items correctly belongs to the category of organs mentioned against it?
Thorn of Bougainvillea and tendrils of Cucurbita - Analogous organs
Nictitating membrane and blind spot in human eye - Vestigial organs
Nephridia of earthworm and Malpighian tubules of cockroach - Excretory organs
Nephridia of earthworm and Malpighian tubules of cockroach - Excretory organs
C.
Nephridia of earthworm and Malpighian tubules of cockroach - Excretory organs
In annelids like Nereis, earthworm, leech etc the tubular coiled structures called nephridia are excretory organs. In phylum - Arthropoda, insects, centipedes, millipedes and arachnids possess Malpighian tubules as their principal excretory organ.
Analogous organs have the almost similar appearance and perform the same function but develop in totally different groups and are totally different in their basic structure and developmental origin, eg, wings of butterfly, birds, bats.
The homologous organs have a common origin, perform varied functions and have a different appearance, eg, thorns of Bougainvillea and tendrils of Cucurbita.
Vestigial organs are useless remnants, which might have been large and functional in the ancestors, eg nictitating membrane, vermiform appendix, etc.
In which one of the following preparations are you likely to come across cell junctions most frequently?
Ciliated epithelium.
Thrombocytes
Tendon
Tendon
Which 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
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