Question

Match Column-I with Column-II and select the correct option from the codes given below.

	Column-I (Parts of alimentary canal of earthworm)		Column-II (Respective segments)
a.	Buccal cavity	(i)	1-3
b.	Pharynx	(ii)	3-4
c.	Oesophagus	(iii)	5-7
d.	Gizzard	(iv)	8-9
e.	Stomach	(v)	9-14
f.	Intestine	(vi)	15 to last
g.	Typhlosole	(vii)	After 26 except the last 23-25

• A. a-(i), b-(ii), c-(iii), d-(iv), e-(v), f-(vi), g-(vii)
• B. b-(i), b-(ii), c-(iii), d-(v), e-(iv), f-(vi), g-(vii)
• C. a-(i), b-(iii), c-(ii), d-(iv), e-(v), f-(vii), g-(vi)
• D. a-(i), b-(iii), c-(ii), d-(v), e-(iv), f-(vii), g-(vi)

Answer 1

The correct option is A a-(i), b-(ii), c-(iii), d-(iv), e-(v), f-(vi), g-(vii)

The alimentary canal of earthworm is a straight tube, runs between first to last segment of the body. A terminal mouth opens into the buccal cavity (1-3 segments) which leads into muscular pharynx (3-4 segments). A small narrow tube, oesophagus (5-7 segments), continues into a muscular gizzard (8-9 segments). The stomach extends from 9-14 segments. Intestine starts from the 15th segment onwards and continues till the last segment. The characteristic feature of the intestine after 26th segment except the last 23rd-25th segments is the presence of internal median fold of dorsal wall called typhlosole.