In Mollusca ,
I. digestive tract is a complete and complex with ciliary tracts for sorting small particles .
II.shows caste system .
III.has a pair of respiratory trumpets .
IV.are blood suckers of vertebrates .
Choose the correct option .

Termite I. is a harmful colonical insect . II.shows caste system . III.has a pair of respiratory trumpets . IV.are blood suckers of vertebrates . Choose the correct option .

Functions of thyroid hormone are I. fat and protein metabolism. II. maintains the IQ and BMR III.maintain blood calcium levels. IV. thermoregulation. Choose the correct option.

Echinus (sea urchin) I. is omnivorous. II.has a masticatory apparatus called Aristotle's lantern . III.has tube feet without suckers . IV.has doliolaria larva in its life cycle . Choose the correct option .

Tap root system I is always underground II is produced by the radicle fo the embryo III consists of a single primary root IV consist of roots forming a cluster Choose the correct option

Red blood cells I. of amphibians are largest among vertebrates. II. of mammals are smallest among vertebrates. III. of mammals are biconc,we and nucleated. IV. are seen in all invertebrates and vertebrates. Choose the option with the correct statements.

Select the correct pair(s). I. Atrichous-Pasteurella. II. Cephalotrichous-Pseudomonas. III. Monotrichous-Vibrio. IV. Lophotrichous -Spirillum. Choose the correct option.