PrepBharat

1. The mouth which has file-like rasping organ for feeding called radula is found in
a) Mollusca
b) Hemichordata
c) Echinodermata
d) Arthropoda

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2. The body of ___ is unsegmented with a distinct head, muscular foot and visceral mass
a) Asterias
b) Ophiura
c) Balanoglossus
d) Devil fish

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3. A. A soft and spongy layer of skin forms a _(i)_ over the visceral hump.
B. A _(ii)_ cavity containing _(iii)_ like gills.
C. The anterior head region has sensory _(iv)_.
Fill in the blanks in the above respective places about mollusca.
a) Mantle, Mantle, Comb, Papilla
b) Mantle, Mesoglea, Feather, Papilla
c) Mantle, Mantle, Feather, Tentacles
d) Mantle, Mantle, Comb, Tentacles

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4. Which of the following is true about reproduction in mollusca?
(1) Mostly dioecious
(2) Oviparous
(3) Mainly indirect development
(4) Fertilization is external or internal
a) All except (4)
b) All except (3)
c) All except (2)
d) All of these

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5. Which of the following is not a fish?
a) Devil fish
b) Cuttle fish
c) Jelly fish
d) All of these

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6. Match the following:
Column I        Column II
A. Pila    –         1. Tusk shell
B. Chiton    –    2. Apple snail
C. Dentalium  – 3. Cuttle fish
D. Sepia    –    4. Chaetopleura
a) A–2, B–1, C–4, D–3
b) A–2, B–4, C–1, D–3
c) A–4, B–2, C–3, D–1
d) A–4, B–3, C–2, D–1

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7. Devil fish is called
a) Pearl oyster
b) Tusk shell
c) Sepia
d) Octopus

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8. Majority of mollusca are
a) Aquatic
b) Terrestrial
c) Aerial
d) Any of the above

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9. Select the total number of organism from the following which are mollusca:
Pila, Pinctada, Sepia, Loligo, Aplysia, Echinus, Antedon, Salpa, Bufo, Chelone, Neophron, Pteropus, Elephas, Pavo
a) 7
b) 6
c) 5
d) 9

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10. Mantle cavity is a site of
a) Excretion
b) Respiration
c) Both (a) and (b)
d) None of these

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