Pepsin is inactivated at pH

• below 3

• below 2

• above 5

• above 3

The main excretory organ of prawn is

• green gland

• flame cell

• Malphigian tubule

• nephridia

Which one shows bio-luminescence?

• Noctiluca

• Polystomella

• Entamoeba

• Suctoria

Moulting hormone is secreted by

• corpora cardiacum

• prothoracic gland

• corpora allata

• neurosecretory hormone

Protists are

(i) unicellular and prokaryote

(ii) unicellular and eukaryote

(iii) multicellular and eukaryote

(iv) autotroph or heterotroph

• (i), (ii) and (iii)

• (ii), (iii) and (iv)

• (iii), (iv)

• (ii), (iv)

Which one affects liver, muscle and adipose tissue?

• Androgen

• Insulin

• Progesterone

• Glucagon

Secretion of gastric juice is stimulated by

• pepsin

• gastrin

• renin

• secretin

Nucleated RBC is present in

• man

• rat

• frog

• rabbit

Mantle, foot and shell are the characteristics of

• Nautilus

• Echinus

• Limulus

• Euplectella

Inner lining of blood vessels is formed by

• ciliated epithelium

• squamous epithelium

• cubical epithelium

• columnar epithelium