A.They are small soft rings. |
B.They are not seen from the outside. |
C.They are openings only on food fish. |
D.They are not used to receive sound. |
A.Trees gain a growth ring each day. |
B.Trees also have otoliths. |
C.Their growth rings are very small. |
D.They both have growth rings. |
A.The elements of the otoliths can tell the history of the sea. |
B.Chemical contents of otoliths can tell how fast fish can swim. |
C.We can know more about fish and their living environment. |
D.Scientists can know exactly how old a fish is. |
A.They are very interested in Thorrold’s research findings. |
B.They want to know where they can find fish. |
C.They lend their fish for chemical studies. |
D.They wonder if Thorrold can find growth rings from their ears. |