OBJECTIVES
OBJECTIVES
Multiple Choice Questions MCQs
1. Which of the followings is not protostome?
(a) Annelids (h) Molluscs (c) Arthropods (d) Echinoderms
2. Larva develop in molluscs is:
(a) Fornaria (h) Aricularia (c) Trochophore (d) none
3. The structure used in scraping of food is:
(a) Mouth (b) Tentacles ( c ) radula ( d) None
4. Shell in molluscs is secreted by:
(a) Head (b) foot (c) Mantle (d) Visceral mass
5. The outer most layer of shell is called:
(a) Nacreous layer (b) Periostracum (c) Prismatic Layer (d) None
6. Chiton belongs to:
(a) Caudotbveata (b) Aplacophora (c) Polyplacophora (d)Monoplacophora
7. Chiton belongs to:
(a) Caudofoveata (b) Monoplacophora (c) Aplacophora
(d) Polyplacophora
8. Neopilina belongs to:
(a) Caudoloveata (b) Aplacophora (c) Polyplacophora (d) Monoplacophora
9. Anodonta belongs to:
(a) Scaphopoda (b) Bivalvia (c) Gastropoda (d) Cephalopoda
10. Helix belongs to:
(a) C’ephalopoda (b) Gastropoda (c) Bivalvia (d) Scaphopoda
11.Octopus belongs to:
(a) Cephalopoda (b) Bivalvia (c) Gastropoda (d) Scaphopoda
12. The anterior portion of gastropods is:
(a) Mouth (h) Radula (c)Proboscis (d) none
13. The excretory organ in gastropods are:
(a) Flame cells (b)Nephron (c)Malphighian (d) Nephridia
14. Osphradia are:
(a) Tactile (b) Chemoreceptor (c)Photoreceptor (d) Auditory
15. The waste product of snail is:
(a) Urea (b) Ammonia (c) Uric acid (d) None
16. The waste product of mussels is:
(a) Urea (b) Ammonia (c) Uric acid (d) None
17. Final larva in molluscs is:
(a) Trochophore (b) veligcr (c) Tornaria (d) None
18. Sea hares belongs:
(a) Prosobranchia (b) Pulmonata (c) Opisthobranchia
19. Terrestrial slug belongs to
(a) Prosobranchia (b) Pulmonata (c) Opisthobranchia
20. Undischarged nematocysts
(a) Pulmonata (b) Prosobranchia (c) Opisthobranchia
21. The foot is modified into the funnel in:
(a) Scaphopoda (b) Bivalvia (c) Gastropoda (d) Cephalopoda
22. Internal shell is present in:
(a) Cephalopoda (b) Bivalvia (c) Gastropoda (d) Scaphopoda
23. The cephalopods capture prey with the help of:
(a) Radula (b) Tentacles (c) Labials (d) Probscis
Ans
1. (d) 2. (c) 3. (c) 4. (c) 5. (b) 6. (c) 7. (a) 8. (d) 9. (b) 10. (b) 11. (a) 12. (c) 13. d) 14. (b)15. (c) 16. (b) 17. (b) 18. (a) 19. (b) 20. (b) 21. (d) 22. (a) 23. (b)
Fill In the blanks
1. A coelom is a body cavity that arises in mesoderm and is lined by a sheet of lesoderrn called ________
2. The animals in which blastopore forms anus and mouth formed as a secondary opening are called _________
3.Body has two parts: head-foot and _____ mass.
4. ……………..is present. It is used in scraping of food.
5. The inner- layer of the shell is called ______ layer.
6………………is a 180°, counterclockwise twisting of the visceral mass, mantle and mantle cavity.
7. Blood leaves the vessels and directly bathes cells in tissue spaces called……………………..
8. The nervous system of primitive gastropod consists of six ______
9. Primitive gastropods possessed two_____……..
10. Pinctuda margarinj era forms highest-quality _____
11. Then water moves into vertical channels in the gills, called…………..
12. Cephalopods are predators. Therefore.. cephalopods depend on their ability to move quickly. They move by_________ system.
13. Allcephalopods possess an ink gland. It opens just behind the anus. Ink is a brown or black fluid. It contains……………………….
An
1.Peritoneum 2. Deutrostomes 3. visceral 4. Radula 5. nacreous 6. Torsion 7. sinuses 8. ganglia 9. nephridia 10. pearls 11. water tubes 12. jet-propulsion 13. melanin
Trne/False
1. The animals in which blastopore forms anus and mouth formed as a secondary opening are called deutrostomes.
2. Cilia is present. It is used in scraping of food.
3. The inner- layer of the shell is called nacreous layer.
4. Distortion is a 1800, counterclockwise twisting of the visceral mass, mantle, and mantle cavity.
5. Blood leaves the vessels and directly bathes cells in tissue spaces called sinuses.
6. The nervous system of primitive gastropod consists of 5 ganglia.
7. Primitive gastropods possessed two nephridia.
8. Pinctuda margaririfera forms highest-quality pearls.
9. Then water moves into vertical channels in the gills, called water tubes.
10. Cephalopods move by jet-propulsion system.
Ans:
1. true 2. F. (Radula) 3. True 4. F. Torsion 5. True 6. F. (6) 7. True 8. True 9. True 10. True
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