Which of the following character is presence essentialy in chordates ?

• Ventral spinal chord

• Dorsal heart

• Pharyngeal gill slits

• Blood flow in forward direction in ventral blood vessels

Chloragogen cells of earthworms are analogous to vertebrate :

• lungs

• liver

• gut

• kidneys

Food storage in Leucosolenia occur by :

• ostia

• osculum

• thesocyte

• spongocoel

Maximum absorption of water occurs in :

• colon

• rectum

• large intestine

• small intestine

Sigmoid notch is formed by :

• cavity formed by humerus

• cavity formed by radio ulna

• cavity formed by tibia fibula

• cavity formed by femur

Trochophore is the larva of :

• Neopilina

• Chiton

• Pila

• all of these

Class Crustacea differ from Insecta in having:

• two pairs of antennae

• jointed foot

• chitinous cuticle

• none of these

Blood leaving liver and going towards heart is rich in :

• bile

• urea

• ammonia

• oxygen

Neural canal is present in :

• humerus

• tibia-fibula

• vertebral column

• cranial bones

'Digestion' word means :

• buring of food

• oxidation of food

• hydrolysis of food

• break down of food