Q. No.Identify the incorrect statement regarding Osteichthyes?
1.
Gills with operculum
2.
Skin covered by placoid scales
3.
Presence of swim bladder
4.
Mostly oviparous
In Amphibia:
| I: | Skin is moist without scales |
| II: | A tympanum represents the ear |
| III: | Fertilization is external |
| 1. | Only I and II are correct | 2. | Only I and III are correct |
| 3. | Only II and III are correct | 4. | I, II, and III are correct |
A water vascular system is characteristically present in:
| 1. | Annelids | 2. | Porifers |
| 3. | Echinoderms | 4. | Cartilaginous fishes |
“Radula”, a rasping tongue like organ is seen in many:
1. Mollusks
2. Flatworms
3. Roundworms
4. Arthropods
In which of the following animals, the body is cylindrical and is composed of an anterior proboscis, a collar and a long trunk?
| 1. | Hemichordates | 2. | Urochordates |
| 3. | Cephalochordates | 4. | Vertebrate chordates |
Perhaps the biggest reason for the enormous success of Arthropods is?
| 1. | Chitinous exoskeleton | 2. | Diverse appendages |
| 3. | Respiration by tracheoles | 4. | Internal fertilization |
Which of the following is not an Arthropod characteristic?
| 1. | Jointed appendages | 2. | Periodic molting |
| 3. | Closed circulation | 4. | Articulated exoskeleton |
Insects are not characterized by:
1. The main body segments – head, thorax and abdomen
2. Three pairs of legs
3. Two pairs of antennae
4. Excretion by Malpighian tubules
Flame cells are excretory structures seen in:
| 1. | Platyhelminthes | 2. | Annelids |
| 3. | Arthropods | 4. | Cnidarians |
Development takes place through a trochophore or veliger larva in:
1. Annelida
2. Mollusca
3. Arthropoda
4. Echinodermata
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