The walking catfish is a species of fish that walks on land using its pectoral fins. During drought conditions, when there is little water in its habitat, the walking
catfish can use its pectoral fins to get across land to areas with water. Which of
these will MOST LIKELY happen to a population of walking catfish over time if all
nearest aquatic environments dry up permanently?
Walking catfish with large pectoral fins and those with small pectoral fins are
equally likely to survive a trip to distant areas of water. Both types survive, so
evolution is unlikely to occur.
Walking catfish with large pectoral fins are more likely to survive a trip to distant
areas of water. The population is likely to evolve to have larger pectoral fins.
Walking catfish with large pectoral fins and those with small pectoral fins are
equally likely to not survive the trip to distant areas of water. Both types of
catfish will then become extinct.
Walking catfish with small pectoral fins are more likely survive a trip to distant
areas of water. The population is likely to evolve to have smaller pectoral fins.