Q. No.In case of poriferans, the spongocoel is lined with flagellated cells called
1. ostia
2. oscula
3. choanocytes
4. mesenchymal cells
Choose the correct statements.
1. All mammals are viviparous
2. All cyclostomes do not possess jaws and paired fins
3. All reptiles have a three-chambered heart
4. All Pisces have gills covered by an operculum
Which of the following characteristic features always holds true for the corresponding group of animals?
| 1. | Viviparous | Mammalia |
| 2. | Possess a mouth with an upper and a lower jaw | Chordata |
| 3. | 3-chambered heart with one incompletely divided ventricle | Reptilia |
| 4. | Cartilaginous – endoskeleton | Chondrichthyes |
Which of the following features is not present in the phylum – Arthropoda?
(1) Metameric segmentation
(2) Parapodia
(3) Jointed appendages
(4) Chitinous exoskeleton
Planaria posses high capacity of
(1) metamorphosis
(2) regeneration
(3) alternation of generation
(4) bioluminescence
A marine cartilaginous fish that can produce electric current is
(1) Pristis
(2) Torpedo
(3) Trygon
(4) Scoliodon
In which one of the following, the genus name, its two characters and its phylum are not correctly matched, whereas the remining three are correct?
| Genus Name | Two characters | Phylum |
| 1. Pila | (i) Body segmented (ii) Mouth with Radula |
Mollusca |
| 2. Asterias | (i) Spiny skinned (ii) Water vascular system |
Echinodermata |
| 3. Sycon | (i) Pore bearing (ii) Canal system |
Porifera |
| 4. Periplaneta | (i) Jointed appendages (ii) Chitinous exoskeleton |
Arthropoda |
What will you look to identify the sex of the following?
| 1. | Male frog – a copulatory pad on the first digit of the hind limb |
| 2. | Female cockroach – anal cerci |
| 3. | Male shark – claspers bone on pelvic fins |
| 4. | Female Ascaris – sharply curved posterior end |
In which one of the following, the genus name, its two characters and its class/phylum are correctly matched?
| Genus Name | Two characters | Class/Phylum | ||
| 1. | Salamandra | (i) | A tympanum represents ear | Amphibia |
| (ii) | Fertilization is external | |||
| 2. | Pteropus | (i) | Skin possesses hair | Mammalia |
| (ii) | oviparous | |||
| 3. | Aurelia | (i) | Cnidoblasts | Coelenterata |
| (ii) | Organ level of organization | |||
| 4. | Ascaris | (i) | Body segmented | Annelida |
| (ii) | Males and Females distinct |
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
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