Air enters the body of an insect through

(1) Tracheoles

(2) Spiracles

(3) Trachea

(4) Nostrils

Which molluscan group has an eye that resembles vertebrate eye?

(1) Gastropoda

(2) Bivalvia

(3) Pelycopoda

(4) Cephalopoda

A closed circulatory system is found in

1. Snail

2. Cockroach

3. Cuttle fish

4. All insects

The simple eyes of insects are called as

(1) Ocelli

(2) Rhabdom

(3) Ommatidium

(4) Uvea

Which one of the following is matching set of phylum and its three examples?

Crustaceans respire through

(1) Gills

(2) Skin

(3) Tracheae

(4) Book lungs

The respiratory organ of the arachnids is the

(1) Gills

(2) Skin

(3) Tracheae

(4) Book lung

Two pairs of uniramous appendages per body segment are a characteristic of

(1) Centipedes

(2) Millipedes

(3) Mites

(4) Crabs

All of the following arthropods are mandibulate except

(1) Millipede

(2) Insect

(3) Crustacean

(4) Scorpion

Transparent rods, found in the center of each ommatidium in the compound eye of arthropods that are constructed from the eight photoreceptor cells in the ommatidium, are called

(1) Ocelli

(2) Rhabdom

(3) Retina

(4) Tapetum