Chitinous exoskeleton is present in

(1) Mollusca

(2) Echinodermata

(3) Arthropoda

(4) Porifera

Nematocytes are present in

(1) Adamsia

(2) Hirudinaria

(3) Sycon

(4) Echinus

Ancylostoma is also known as

(1) Pinworm

(2) Hookworm

(3) Flatworm

(4) Filarial worm

Which of the following is called pearl oyster?

1. Dentalium

2. Pinctada

3. Pila

4. Aplysia

Radial symmetry is seen in

(1) Mollusca

(2) Chordata

(3) Porifera

(4) Ctenophora

Which of the following is dioecious?

(1) Taenia

(2) Fasciola

(3) Ascaris

(4) Earthworm

In which of the following are air sacs connected to the lungs?

1. Neophron

2. Testudo

3. Ornithorhynchus

4. Chelone

Which of the following statements about Aschelminthes is incorrect

(1) They are pseudocoelomate

(2) Digestive system is complete

(3) Circulatory and respiratory system is well developed

(4) Distinctive features include –often worm shaped, elongated

Which of the following shows organ and organ system level of organisation for the first time?

(1) Annelida

(2) Ctenophora

(3) Platyhelminthes

(4) Aschelminthes