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81.

Tosin is produced by:

A.	Penetrant	B.	Desmonems
C.	Glutinants	D.	Volvents

82.

Symbiotic algae is found in which of these cells of hydra:

A.	Gastrodermal cells	B.	Epitheliomuscular cells
C.	Mesogloea	D.	Interstitial cells

83.

Mucus is secreted in Hydra by:

A.	Interstitial cells	B.	Mucus gland cells
C.	Enzyme cells	D.	Epitheliomuscular cells

84.

Atrichous isorhizas are with:

A.	Spiny base	B.	Spine on whole tube
C.	No spines	D.	Spines on butt

85.

Stenosteles of Hydra have:

A.	Spines on the butt	B.	No spines
C.	Spines on the whole thread	D.	None of these

86.

Response of Hydra to light is:

A.	Photonegative	B.	Photopositive
C.	Some photopositive some negative	D.	None of these

87.

Colony of Obelia is:

A.	Free floating	B.	Fixed
C.	Swimming	D.	None of these

88.

Colony of Obellia is:

A.	Monomorphic	B.	Dimorphic
C.	Trimorphic	D.	None of these

89.

Hydranths in Obelia colony are:

A.	Feeding zooids	B.	Sensory zooids
C.	Reproductive zooids	D.	None of these

90.

Obelia colony has:

A.	Gastrozooids	B.	Blastostyles
C.	Both (a) & (b)	D.	None of these