Salamandra atra is
ovoviviparous
oviparous
sexuaily sterile
parthenogenetic
A.
ovoviviparous
The Salamandra atra is ovoviviparous. The male discharge sperms in a capsule known as spermatophore. It is picked up by a female to fertilize her eggs internally. The female give birth to larvae and develops completely in water.
ADH controls water permeability of
collecting tube
distal convoluted tubule
proximal convoluted tubule
bowman's capsule
During the conduction of nerve impulse, the action potential is the result of movement of
Na+ from intracellular fluid to extracellular fluid
Na+ from extracellular fluid to intracellular fluid
Na+ towards both directions
None of the above
Which are the longest cells in the body of man ?
Muscle cells of legs
Bone cells
Nerve cells
None of the above
Which one is uricotelic ?
Frog and toads
Lizards and birds/cockroach
Cattle, monkey and man
Molluscs and teleost fishes
The sliding filament theory of muscle contraction was proposed by
A.F. Huxley and A.P. Pullman
A.F. Huxley and H.E. Huxley
B. Pullman and A.F. Huxley
A. Pullman and E. Pullman
Vitamin essential for proper functioning of liver and clotting of blood is
Vitamin- K
Vitamin- A
Vitamin- E
Vitamin- B12
Which of the following is not a character of Chordata?
Dorsal tubular nerve cord
Pharyngeal gill slits
Presence of notochord
Presence of spinal cord
