outlining proposed research on clown-fish reproduction
attempting to reconcile inconsistent observations of clown-fish development
18. It can be inferred from the passage that the clown fish is able to survive in close association with the sea anemone because the
sea anemone cannot detect the presence of the clown fish
tentacles of the sea anemone cannot grasp the slippery clown fish
sea anemone prefers other prey
clown fish does not actually come within the range of the sea anemones tentacles
clown fish has developed tolerance to the sea anemones poison
19. According to the passage, adult clown fish would be at a disadvantage if they were not associated with sea anemones because the clown fish would
be incapable of sexual transformation
be vulnerable to predators
have no reliable source of food
have to lay their eggs in the open
face competition from other clown fish
20. It can be inferred from the passage that sex change would have been less necessary for the clown fish if
the male clown fish were larger than the female
each sea anemone were occupied by several varieties of clown fish
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