Which of the following is the best example of coevolution? A. Some plants that require pollination have developed ways to attract pollinators, such as brightly colored and fragrant flowers: pollinators have developed specialized structures to obtain pollen and nectar from the plants: B. Sharks and dolphins look very similar, but sharks are a type of fish, and dolphing are a type of marmmal. C. Brds and bats both have wings, but these structures developed independently. D. Antibiotie-resistant strains of bacteria proliferate when antibiotics kill good bacteria and select for any cells resistant to that antibiotic.
The Correct Answer and Explanation is :
The correct answer is A. Some plants that require pollination have developed ways to attract pollinators, such as brightly colored and fragrant flowers; pollinators have developed specialized structures to obtain pollen and nectar from the plants.
Explanation:
Coevolution is the process by which two or more species reciprocally influence each other’s evolution. It typically occurs when two species have close ecological interactions, such as predator-prey, host-parasite, or mutualistic relationships, and their evolutionary changes are driven by these interactions. The key to coevolution is that the evolutionary changes in one species lead to changes in the other species, creating a feedback loop.
In answer A, plants and pollinators are engaged in a mutualistic relationship. Plants depend on pollinators to transfer pollen for reproduction, and pollinators (such as bees, butterflies, or birds) rely on the plants for nectar or pollen as food sources. Over time, plants have evolved to produce brightly colored and fragrant flowers to attract specific pollinators. In turn, the pollinators have evolved specialized traits to access these rewards, such as long proboscises or specialized appendages to collect pollen. This reciprocal influence on the evolution of both the plants and the pollinators makes this an example of coevolution.
Why the other options are not coevolution:
- B. Sharks and dolphins look very similar, but sharks are a type of fish, and dolphins are a type of mammal.
This is an example of convergent evolution, where unrelated species evolve similar traits due to similar environmental pressures, not because of a direct evolutionary interaction between the species. - C. Birds and bats both have wings, but these structures developed independently.
This is another example of convergent evolution. Both birds and bats have wings, but these structures evolved independently in different evolutionary lineages, so they are not the result of coevolution. - D. Antibiotic-resistant strains of bacteria proliferate when antibiotics kill good bacteria and select for any cells resistant to that antibiotic.
This is an example of natural selection acting on bacteria. While antibiotics exert selective pressure on bacteria, it is not an example of coevolution because it does not involve two species evolving in response to each other.