Which one of the following groups of animals is correctly matched with its one characteristic feature without even a single exception?

(1) Chordata - possess a mouth provided with an upper and a lower jaw

(2) Chondrichthyes - possess cartilaginous endoskeleton

(3) Mammalia - give birth to young ones

(4) Reptilia - possess 3-chambered heart with one incompletely divided ventricle

Which one of the following statements about all the four of Spongilla, leech, dolphin and penguin is correct?

Which one of the following kinds of animals are triploblastic?

(1) Flat worms

(2) Sponges

(3) Ctenophores

(4) Corals

Which one of the following statements about certain given animals is correct?

1. Round worms (Aschelminthes) are pseudocoelomates

2. Molluscs are acoelomates

3. Insects are pseudocoelomates

4. Flat worms (Platyhelminthes) are coelomates

Which one of the following groups of animals is bilaterally symmetrical and triploblastic?

(1) Coelenterates (cnidarians)

(2) Aschelminthes (round worms)

(3) Ctenophores

(4) Sponges

Which one of the following pairs of animal comprises ‘jawless fishes’?

(1) Lampreys and eels

(2) Mackerels and rohu

(3) Lampreys and hag fishes

(4) Guppies and hag fishes

Which one of the following is not a characteristic of phylum-Annelida?

(1) Closed circulatory system

(2) Segmentation

(3) Pseudocoelom

(4) Ventral nerve cord

Which one of the the following phyla is correctly matched with its two general characteristics?

(1) Arthropoda − Body divided into head, thorax and abdomen and respiration by mouth

(2) Chordata − Notochord at early stage only and separate anal and urinary openings to the outside

(3) Echinodermata − Pentamerous radial symmetry and mostly internal fertilization

(4) Mollusca − Normally oviparous and development through a trochophore or veliger larva

Which one of the following pairs is mismatched?

What is common between parrot, platypus and kangaroo?

(1) Homeothermy

(2) Toothless jaws

(3) Functional post-anal tail

(4) Oviparity