Stinging capsules (nematocysts) are found in
(1) wasp and honeybee
(2) scorpion and cobra
(3) sea pen and sea fan
(4) cactus and Venus flytrap
In the given table, some organisms are classified into categories. However, there is one exception. Select the option with correctly mentioned exceptional organism.
| Organisms | Category | Exception | |
| 1. | Penicillium, Aspergillus, Mucor | Fungi | Mucor |
| 2. | Cacti, Venus flytrap | Plants | Cacti |
| 3. | Ascaris, Nereis, Wuchereria | Aschelminthes | Nereis |
| 4. | Scorpion, Prawn, Anopheles | Arthropoda | Prawn |
Choose the correct pair.
| 1. | Coconut, cucurbits | - dioecious |
| 2. | Honeybee, Rotifers | - Parthenogenesis |
| 3. | Ornithorhyncus, Whale | - viviparity |
| 4. | Frog, Peacock | - external fertilisation |
Select the incorrect statement.
(1) Periplaneta has compound eyes.
(2) Earthworm shows segmentation.
(3) Ascaris shows sexual dimorphism
(4) Liver fluke has a complete alimentary canal
Which of the following waste products in grasshopper is not excreted and is used in other metabolic activities?
(1) Carbon dioxide
(2) Water
(3) Uric acid
(4) Faeces
Select the animal that exhibits retrogressive metamorphosis.
(1) Bufo
(2) Amphioxus
(3) Limulus
(4) Herdmania
Which one of the following is not a mammalian character?
| 1. | Presence of milk producing glands |
| 2. | Skin is unique in possessing hair |
| 3. | Presence of external ears called pinnae |
| 4. | Homodont type of dentition |
Retrogressive metamorphosis occurs in
1. Hemichordata
2. Cephalochordata
3. Urochordata
4. Vertebrata
Some salient features and phyla of organisms are given below. Select the option which shows the correct combination of organism, its phylum and salient features.
| 1. Hydra | Coelenterata | Bilateral symmetry | Cnidoblasts present |
| 2. Planaria | Platyhelminthes | Bilateral symmetry | High regeneration capacity |
| 3. Ancylostoma | Annelida | Bilateral symmetry | Elongated and worm shape |
| 4. Octopus | Mollusca | Radial symmetry | External skeleton of shell present |
Select the correct statement regarding reproduction.
| 1. | Mating in dogs is synchronised with lunar cycle. |
| 2. | Salamanders always have internal fertilisation. |
| 3. | In Trygon, the male introduces sperms into female through a modified pelvic fin. |
| 4. | Catla has internal fertilisation. |
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