Which of the following is not an excretory structure found in invertebrates?

1. Flame cells

2. Malpighian tubules

3. Nephridia

4. Kidney

Nematocytes are present in

(1) Adamsia

(2) Hirudinaria

(3) Sycon

(4) Echinus

Which of the following is dioecious?

(1) Taenia

(2) Fasciola

(3) Ascaris

(4) Earthworm

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

Ancylostoma is also known as

(1) Pinworm

(2) Hookworm

(3) Flatworm

(4) Filarial worm

Chitinous exoskeleton is present in

(1) Mollusca

(2) Echinodermata

(3) Arthropoda

(4) Porifera

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

(1) Neophron

(2) Testudo

(3) Ornithorhynchus

(4) Chelone

Pseudocoelomate among the following is

(1) Ancylostoma

(2) Nereis

(3) Pheretima

(4) Taenia

Which of the following is not an avian character?

(1) Cartilaginous bones which are pneumatic

(2) Homoiothermus

(3) Hind limbs have scales

(4) Fertilisation is internal