Why are frogs absent on the Galagos and other oceanic islands?
A. Frogs were unable to migrate to oceanic islands because they evolved after all of the continents drifted apart.
B. Frogs were unable colonize oceanic islands because they require a large amount of space (Habitat) and the islands are too small.
C.Aquatic frogs survive in fresh water only and oceanic islands do not have sources of fresh water (only salt water).
D.Since frogs are land dwelling and the islands arose from the sea, there was no way for the frogs to get to the islands.
Ans. Option C is correct.
Amphibians such as frogs have moist skin and their skin is very much sensitive towards saltwater and thus they cannot survive a long journey in the sea. Therefore, they are absent in Galagos and other oceanic islands.
The frogs appeared approximately 300 million years ago, much before the continental drift hence, option A is incorrect.
The frogs do not require very large space to survive hence, option C is incorrect.
The frogs are amphibians they dwell at land and water both hence, option D is incorrect.
Why are frogs absent on the Galagos and other oceanic islands? A. Frogs were unable to...
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