Animal Kingdom

Peripatus is a connecting link between:

1. Ctenophora and Platyhelminthes
2. Mollusca and Echinodermata
3. Coelenterata and Porifera
4. Annelida and Arthropoda

Which one of the following in birds indicates their reptilian ancestry?

1. Two special chambers crop and gizzard in their digestive tract
2. Eggs with a calcareous shell
3. Scales on their hind limbs
4. Four-chambered heart

Ascaris is characterized by

1. presence of true coelom but absence of metamerism
2. presence of true coelom and metamerism (metamerisation)
3. absence of true coelom but presence of metamerism
4. presence of neither true coelom nor metamerism

Which one of the following groups of three animals each is correctly matched with their one characteristic morphological feature?

1. array|l|l| Animals & Morphological features \ Scorpion, spider, cockroach & ventral solid central nervous system \ array
2. array|l|l| Animals & Morphological features \ Cockroach, locust, Taenia & metameric segmentation \ array
3. array|l|l| Animals & Morphological features \ Liver fluke, sea anemone, sea cucumber & bilateral symmetry \ array
4. array|l|l| Animals & Morphological features \ Centipede, prawn, sea urchin & jointed appendages \ array

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

1. Echinodermata - pentamerous radial symmetry and mostly internal fertilization
2. Mollusca - normally oviparous and development through a trochophore or veliger larva
3. Arthropoda - body divided into head, thorax and abdomen and respiration by tracheae
4. Chordata - notochord at some stage and separate anal and urinary openings to the outside

Which one of the following is not a characteristic of Phylum Annelida?

1. Pseudocoelom
2. Ventral nerve cord
3. Closed circulatory system
4. Segmentation

Which of the following pairs are correctly matched? array|l|l|c|l| & Animals & & Morphological features \ (i) & Crocodile & – & 4-chambered heart \ (ii) & Sea urchin & – & Parapodia \ (iii) & Obelia & – & Metagenesis \ (iv) & Lemur & – & Thecodont \ array

1. (ii), (iii) and (iv)
2. only (i) and (iv)
3. only (i) and (ii)
4. (i), (iii) and (iv)

Which one of the following is a matching pair of body feature and the animal possessing it?

1. Ventral central nervous system – Leech
2. Pharyngeal gill slits absent in embryo – Chamaeleon
3. Ventral heart – Scorpion
4. Post-anal tail – Octopus

What is common between parrot, platypus and kangaroo?

1. Toothless jaws
2. Functional post-anal tail
3. Oviparity
4. Homoiothermy

What is true about Nereis, scorpion, cockroach and silverfish?

1. They all possess dorsal heart.
2. None of them is aquatic.
3. They all belong to the same phylum.
4. They all have jointed paired appendages.