Tube within tube plan is exhibited by which of the following groups of animals?

• Arthropods

• Cephalochordates

• Annelids

• Mollusca

Select the correct set of animals of Class- Mammalia.

• Lion, bat, whale, ostrich

• Whale, bat, kangaroo, hippopotamus

• Lion, hippopotamus, penguin, bat

• Hippopotamus, penguin, whale, kangaroo

Respiration in Ascaris is

• aerobic respiration

• anaerobic respiration

• Both (a) and (b)

• None of the above

Comb jelly is member of phylum

• Mollusca

• Echinodermata

• Coelenterata

• Ctenophora

Jaws present in which of the following?

• Herdmania

• Fishes

• Petromyzon

• Amphioxus

Which of the following is not insect?

• Spider

• Grasshopper

• Fly

• Bee

Microlecithal eggs are present in

• Insects

• Aves

• Fishes

• Mammals

Digestion in Leucosolenia and other sponges is

• only extracellular

• only intracellular

• first extracellular, then intracellular

• first intracellular, then extracellular

A cysticerous in pig muscles can remain alive for

• six months

• one year

• six years

• one month

Molluscan blood contains

• haemoglobin

• haemozoin

• haemocyanin

• All of these