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

• Arthropods

• Cephalochordates

• Annelids

• Mollusca

Molluscan blood contains

• haemoglobin

• haemozoin

• haemocyanin

• All of these

Moulting in snakes is done by shedding

• comified cells

• stratified germinativum

• epidermis

• dermis

284.

Leveret is young one of

• eagle

• hawk

• deer

• None of these

Which one is not diploblastic?

• Sponge

• Cnidarian

• Nematoda

• Tenophora

Which of the following is made up of a single bone in mammals?

• Dentary

• Hyoid

• Upper jaw

• All of these

Gemmule formation in sponges are useful in

• asexual reproduction

• sexual reproduction

• parthenogenesis

• parthenocarpy

During its life cycie, Fasciola hepatica (liver fluke) infects its intermediate host and primary host at the following larval stages respectively

• metacercaria and ceracaria

• miracidium and metacercaria

• redia and miracidium

• cercaria and redia

Sycon belongs to a group of animals which are best described as

• multicellular with a gastrovascular system

• multicellular having tissue organisation, but no body cavity

• unicellular or acellular

• multicellular without any tissue organisation

Water vascular system is characteristic of

• Protozoa

• Porifera

• Annelida

• Echinodermata