11. Which of the following is a bivalve mollusk?
a) Snail
b) Clam
c) Squid
d) Octopus
Answer: b) Clam
12. Mollusks respire through:
a) Gills
b) Lungs
c) Spiracles
d) Skin
Answer: a) Gills
13. Fishes reproduce through:
a) Fission
b) Budding
c) Fertilization
d) Fragmentation
Answer: c) Fertilization
14. Which of the following is not a jawless fish?
a) Lamprey
b) Hagfish
c) Trout
d) Eel
Answer: c) Trout
15. Fishes belong to which phylum?
a) Mollusca
b) Arthropoda
c) Porifera
d) Chordata
Answer: d) Chordata
