1. | Body covered with moist skin which is devoid of scales, the ear is represented by a tympanum, alimentary canal, urinary and reproductive tracts open into a common cloaca |
2. | Freshwater animals with a bony endoskeleton and air bladder to regulate buoyancy |
3. | Marine animals with cartilaginous endoskeletons, bodies covered with placoid scales |
4. | Body covered with dry and cornified skin, scales over the body are epidermal, they do not have external ears |
Animal | Excretory organs | Excretory product | |
1. | Labeo (Rohu) | Nephridial tubes | Ammonia |
2. | Salamander | Kidney | Urea |
3. | Peacock | Kidney | Urea |
4. | Housefly | Renal tubules | Uric acid |
Animal | Characteristic | Taxon | |
1. | Millipede | Ventral nerve cord | Arachnids |
2. | Sea Anemone | Triploblastic | Cnidaria |
3. | Silverfish | Pectoral and pelvic fins | Chordata |
4. | Duckbilled platypus | Oviparous | Mammalian |
1. | Gill slits are ventrally placed |
2. | Head and trunk are widened considerably |
3. | Distinct demarcation between body and tail |
4. | Their pectorals fins are distinctly marked off from cylindrical bodies |
Which one of the following statements is totally wrong about the occurrence of a notochord, while the other three are correct?
1. | It is present throughout life in Amphioxus |
2. | It is present only in larval tails in Ascidians |
3. | It is replaced by the vertebral column in an adult frog |
4. | It is absent throughout life in humans from the very beginning |
The figure shows four animals (a), (b), (c) and (d). Select the correct answer with respect to a common characteristic of two of these animals:
(a) | (b) | ||
(c) | (d) |
1. (c) and (d) have a true coelom
2. (a) and (d) respire mainly through body wall
3. (b) and (c) show radial symmetry
4. (a) and (b) have cnidoblasts for self-defence
Crocodile and Penguin are similar to Whale and Dogfish in which one of the following features?
1. Lay eggs and guard them till they hatch
2. Possess bony skeleton
3. Have gill slits at some stage
4. Possess a solid single-stranded central nervous system
Which one of the following pairs of animals is similar to each other pertaining to the feature stated against them?
1. | Garden lizard and Crocodile - Three-chambered heart |
2. | Ascaris and Ancylostoma - Metameric segmentation |
3. | Sea horse and Flying fish - Cold-blooded (poikilothermal) |
4. | Pteropus and Ornithorhyncus - Viviparity |
Which one of the following categories of animals, is correctly described with no single exception in it?
1. | All bony fishes have four pairs of gills and an operculum on each side |
2. | All sponges are marine and have collared cells |
3. | All mammals are viviparous and possess a diaphragm for breathing |
4. | All reptiles possess scales, have a three-chambered heart, and are cold blood (poikilothermal) |