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Homologous
The fins of fishes and flipper of a whale are homologous structures since they have different structure but similar structure
The correct option is A.
The nature is organized in such a way that, one organism's waste is what the other organism will use as its own resources. For instance, during the process of photosynthesis, the oxygen that is produced as the by product of the photosynthesis process is what humans use to carry out their own breathing process.
Fastest is o over a hundred knots per hour slowest is from under one knot per hour
