Q. No.Identify the incorrect statement regarding cnidocytes:
1.
Their presence defines Cnidarians
2.
They are used to capture prey and as a defense against predators.
3.
The release of potassium ions plays primary role in the function.
4.
The mechanism of their action is dependent on osmotic pressure.
Identify the incorrect statement regarding acorn worm, a hemichordate:
| 1. | The body is divided into an anterior proboscis, an intermediate collar, and a posterior trunk. |
| 2. | The proboscis is a muscular and ciliated organ used in locomotion and in the collection and transport of food particles. |
| 3. | The mouth is located between the collar and the trunk. |
| 4. | The trunk contains the pharynx, which is perforated with gill slits (or pharyngeal slits), the oesophagus, a long intestine, and a terminal anus. |
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The enzyme luciferase is associated with:
1. Eutely
2. Cryptobiosis
3. Bioluminescence
4. Diapause
Consider the two statements:
| I: | Metamerism in animals is same as segmentation. |
| II: | Both result in serial repetition of unit subdivisions of ectoderm and mesoderm products. |
| 1. | Both I and II are correct and II explains I |
| 2. | Both I and II are correct but II does not explain I |
| 3. | Only I is correct |
| 4. | Both I and II are incorrect |
Bilaharzia is caused by Schistosoma that belongs to:
1. Protozoans
2. Nematodes
3. Arthropods
4. Flat worms
Which of the following is unique to the molluscs and has no equivalent in any other animal?
| 1. | Haemocoel | 2. | Hemocyanin |
| 3. | Radula | 4. | Metamerism |
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Identify the correct statements regarding arthropods:
| I: | All arthropods use internal fertilization |
| II: | All arthropods lay eggs |
| III: | All arthropods' embryos are segmented |
| 1. | Only II | 2. | Only III |
| 3. | Only I and II | 4. | None |
The second intermediate host required by Clonorchis sinensis is:
| 1. | A snail | 2. | A fish |
| 3. | A crustacean | 4. | A coral |
The type of coelom seen in echinoderms and chordates is the:
1. Psuedocoelom
2. Enterocoelom
3. Schizocoelom
4. Haemocoel
Most of the sponge's ingestion is carried out by:
1. Archaeocyte
2. Choanocyte
3. Collencyte
4. Sclerocyte
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