Mammals have

• biconvex RBCs to increase the surface area

• biconcave RBCs to increase the surface area

• spherical RBCs to increase the surface area

• no RBCs

Haemocyanin pigment is found in which of the following animal group?

• Annelida

• Insects

• Lower invertebrates

• Platyheliminthes

The eggs of the amphibians are

• Mesolecithal

• Telolecithal

• Centrolecithal

• Homolecithal

Aristotle's lentern is

• pedicellariae in Pycnopodia

• arval form in Antedon

• pressure equalisation plate in Asterias

• masticatory organ in the digestive tract of sea urchin

Ornithorhynchus is a connecting link between

• fishes and amphibians

• Annelida and Arthropoda

• Annelida and Mollusca

• reptiles and mammals

A fish introduced into a water body to control mosquito population is

• Gambusia

• Labeo

• Notopterus

• Fistularia

Identify the incorrect match

• Mulberry silk - Bombyx mori

• Tasar silk - Antheraea pernyi

• Muga silk - Antheraea assama

• Eri silk - Attacus ricini

All chordates at one or other stage possess

• two pairs of pentadactyl limbs

• pharyngeal gill slits

• movable jaw

• vertebral column

Mehli's gland in tapeworm is associated with

• respiration

• reproduction

• excretion

• circulation

Which of the following animals has a tetramorphic colony?

• Velella

• Physalia

• Obelia

• Porpita