Q. No.What will you look for to identity the sex of the following? Select the correct match.
1.
Male frog – a copulatory pad on the first digit of the hind limb
2.
Female cockroach – anal cerci
3.
Male shark – claspers borne on pelvic fins
4.
Female Ascaris – sharply curved posterior end
| 1. | Male frog – a copulatory pad on the first digit of the hind limb |
| 2. | Female cockroach – anal cerci |
| 3. | Male shark – claspers borne 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 | Two Characters | Class/phylum |
| (a) Salman dra | (i) A tympanum represents ear (ii) Fertilisation is external |
Amphibia |
| (b) Pteropus | (i) Skin possesses hair (ii) Oviparous |
Mammalia |
| (c) Aurelia | (i) Cnidobles (ii) organ level of Organisation |
Coelenterata |
| (d) Ascaris | (i) Body segmented (ii) Males and Female distinct |
Annelida |
2. (b)
3. (c)
4. (d)
| 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 – possesses 3-incomplete heart with one incompletely divided ventricle. |
Which one of the following statements about all the four of Spongilla, leech, dolphin and penguin is correct?
| 1. | Penguin is homoiothermic while the remaining three are poikilothermic |
| 2. | Leech is a freshwater form while others are marine |
| 3. | Songilla has special collared cells called choanocytes, not found in the remaining three |
| 4. | All are bilaterally symmetrical |
Which one of the following kinds of animals are triploblastic?
1. Flatworms
2. Sponges
3. Ctenophores
4. Corals
Which one of the following statements about certain given animals is correct?
1. Roundworms(Aschelminthes) are pseudocoelomates
2. Molluscs are acoelomates
3. Insects are pseudocoelomates
4. Flatworms (Platyhelminthes) are coelomates
Which one of the following groups of animals is bilaterally symmetrical and triploblastic?
1. Coelenterates (cnidarians)
2. Ascheminthes (roundworms)
3. Ctenophores
4. Sponges
Which one of the following pair of animals comprises 'jawless fishes'?
1. Lampreys and eels
2. Mackerals and rohu
3. Lampreys and hagfishes
4. Guppies and hagfishes
| 1. | Scales on their hind limbs |
| 2. | Four-chambered heart |
| 3. | Two special chambers crop and gizzard in their digestive tract |
| 4. | Eggs with a calcareous shell |
1. Closed circulatory system
2. Segmentation
3. Pseudocoelom
4. Ventral nerve cord
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