Which are the longest cells in the body of man ?

• Muscle cells of legs

• Bone cells

• Nerve cells

• None of the above

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

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

Apis dorsata refers to

• rock bee

• little bee

• Indian bee

• European bee

Vitamin essential for proper functioning of liver and clotting of blood is

• Vitamin- K

• Vitamin- A

• Vitamin- E

• Vitamin- B₁₂

ADH controls water permeability of

• collecting tube

• distal convoluted tubule

• proximal convoluted tubule

• bowman's capsule

Flying fish is

• Torpedo

• Scoliodon

• Anguilla

• Exocoetus

Which of the following is not a character of Chordata?

• Dorsal tubular nerve cord

• Pharyngeal gill slits

• Presence of notochord

• Presence of spinal cord

Which one is uricotelic ?

• Frog and toads

• Lizards and birds/cockroach

• Cattle, monkey and man

• Molluscs and teleost fishes

Salamandra atra is

• ovoviviparous

• oviparous

• sexuaily sterile

• parthenogenetic