Text 4. Jawless Fish Jawless fish

1. Jawless fish do not … scales and fins.

a) lack c) use

b) have d) apply

2. The lamprey is … to a snake.

a) different c) similar

b) various d) look

3. The lamprey … its teeth and tongue to drill a hole into the fish.

a) uses c) attaches

b) lacks d) sucks

4. The lamprey is flexible because it is … .

a) jawless c) bony

b) snake-like d) cartilaginous

5. The … of a jawless fish contains cartilage.

a) fin c) skeleton

b) scale d) tooth

6. The great white shark … to cartilaginous fish.

a) resembles c) attacks

b) belongs d) attaches

7. Sharks … jaws.

a) need c) have got

b) stun d) lack

8. Skates have got large … sticking out of their sides.

a) fins c) jaws

b) scales d) mouths

9. Fins help rays … .

a) breed c) swim

b) fly d) feed

10. Some rays use tail to … themselves.

a) hide c) catch

b) defend d) capture

Text 5. Reproduction and Life-Cycle of the Perch

1. Spawning of perch takes place in ……….

a) cold weather c) hot weather

b) warm weather d) cloudy weather

2. The fish gather in great.......

a) backwaters c) shoals

b) weeds d) shallows

3. The fertilized egg of the Perch divides into ……..cells.

a) two c) four

b) three d) five

4. The eggs laid by the female remain glued together in long strings which hang on the………

a) backwaters c) weeds

b) trees d) male

5. The males excrete jellied fluid containing…………….

a) eggs c) sperms

b) weeds d) strings

6. In about 5 or 6 days the ………. becomes a small larval fish.

a) cell c) fish

b) embryo d) larva

7. The………has a yolk sac on its belly.

a) cell c) fish

b) embryo d) larval fish

8. The remainder of the food is reserved in the………. for the development.

a) cell c) yolk sac

b) embryo d) larval fish

9. ………..are most suitable for perch’s spawning.

a) mountains c) long strings

b) shallow backwaters d) corals

10. The behavior of the Perch at spawning time is very …………..

a) conscience c) complex

b) simple d) unconditional