Connecting link between annelids and molluscs is

• Neopilina

• Peripatus

• Periplaneta

• Limulus

Shell of molluscs is derived from

• foot

• mantle

• ctenidia

• placoid

A man of 'A' blood group marries a woman of 'AB' blood group. Which type of progeny would indicate that man is heterozygous?

• O

• B

• A

• AB

Action potential is generated by

• Na⁺

• K⁺

• Ca⁺

• Cl^-

Aqueous and vitreous humour are divided by

• lens

• iris

• retina

• optic nerve

Indian rhinoceros are protected in

• Gir forest

• Kaziranga National Park

• Bandipur National Park

• Ranthambore National Park

Mitotic spindle have main protein

• tubulin

• myosin

• tropomyosin

• dynein

18.

Ligament is mainly made up of

• reticulin

• elastin

• myosin

• collagen

Secretion of pancreatic juice is stimulated by

• gastrin

• secretin

• enterogasteron

• enterokinase

Crossing over occurs in

• zygotene

• leptotene

• pachytene

• diplotene