What interactions exist between a "carrier crab" and "sea urchin hitch-hiker"?

What interactions exist between a "carrier crab" and "sea urchin hitch-hiker"?

09:31

What interactions exist between a "carrier crab" and "sea urchin hitch-hiker"?



A) +/+

B) +/o

C) +/-

D) o/o

E) -/-



Answer: A +/+


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