Animal Kingdom · Question 69

Sharks and dogfishes differ from skates and rays because

1. gill slits are ventrally placed
2. head and trunk are widened considerably
3. distinct demarcation between body and tail
4. their pectoral fins distinctly marked off from cylindrical bodies.

Which one of the following pairs of animals are similar to each other pertaining to the feature stated against them?

1. Pteropus and Ornithorhynchus – Viviparity
2. Garden lizard and crocodile – Three chambered heart
3. Ascaris and Ancylostoma – Metameric segmentation
4. Sea horse and flying fish – Cold blooded (poikilothermal)

Which one of the following categories of animals, is correctly described with no single exception in it?

1. All reptiles possess scales, have a three chambered heart and are cold blooded (poikilothermal).
2. All bony fishes have four pairs of gills and an operculum on each side.
3. All sponges are marine and have collared cells.
4. All mammals are viviparous and possess diaphragm for breathing.

Which one of the following characteristics is common both in humans and adult frogs?

1. Four chambered heart
2. Internal fertilization
3. Nucleated RBCs
4. Ureotelic mode of excretion

In which one of the following, the genus name, its two characters and its phylum are not correctly matched, whereas the remaining three are correct?

1. array|l|l|l| Genus name & Two characters & Class/Phylum \ Pila & (a) Body segmented & Mollusca \ & (b) Mouth with radula & \ array
2. array|l|l|l| Genus name & Two characters & Class/Phylum \ Asterias & (a) Spiny skinned & Echinodermata \ & (b) Water vascular system & \ array
3. array|l|l|l| Genus name & Two characters & Class/Phylum \ Sycon & (a) Pore bearing & Porifera \ & (b) Canal system & \ array
4. array|l|l|l| Genus name & Two characters & Class/Phylum \ Periplaneta & (a) Jointed appendages & Arthropoda \ & (b) Chitinous exoskeleton & \ array

Which one of the following statements is totally wrong about the occurrence of notochord, while the other three are correct?

1. It is present only in larval tail in ascidian.
2. It is replaced by a vertebral column in adult frog.
3. It is absent throughout life in humans from the very beginning.
4. It is present throughout life in Amphioxus.

The figures (A – D) show four animals. Select the correct option with respect to a common characteristic of two of these animals. [Figure]

1. (A) and (B) have cnidoblasts for self-defence
2. (A) and (D) respire mainly through body wall
3. (C) and (D) have a true coelom
4. (B) and (C) show radial symmetry

What will you look for to identify the sex of the following?

1. Female Ascaris – sharply curved posterior end
2. Male frog – a copulatory pad on the first digit of the hind limb
3. Female cockroach – anal cerci
4. Male shark – claspers borne on pelvic fins

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

1. Reptilia : possess 3-chambered heart with an incompletely divided ventricle
2. Chordata : possess a mouth with an upper and a lower jaw
3. Chondrichthyes : possess cartilaginous endoskeleton
4. Mammalia : give birth to young ones

In which one of the following the genus name, its two characters and its class/phylum are correctly matched?

1. array|l|l|l| Genus name & Two characters & Class/Phylum \ Ascaris & (i) Body segmented & Annelida \ & (ii) Males and females distinct & \ array
2. array|l|l|l| Genus name & Two characters & Class/Phylum \ Salamandra & (i) A tympanum represents ear & Amphibia \ & (ii) Fertilization is external & \ array
3. array|l|l|l| Genus name & Two characters & Class/Phylum \ Pteropus & (i) Skin possesses hair & Mammalia \ & (ii) Oviparous & \ array
4. array|l|l|l| Genus name & Two characters & Class/Phylum \ Aurelia & (i) Cnidoblasts & Coelenterata \ & (ii) Organ level of organization & \ array