A murky pond with brown fish and orange fish has existed peacefully over many decades. Suddenly, a new predator crane has come to the area and loves to eat fish.
1. Explain how natural selection might work in this scenario and why?
2. Can an organism “will” itself to adapt to a new environment so it can increase its fitness?
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One is independent colonisation. Temporary ponds or lakes form at specific, predictable times every year - the start of the rainy season. They may be changing now with climate change, but the pattern is still the same. Terrestrial adults of many freshwater insect nymphs and larvae have adapted so that by the time the dry season comes, they have reproduced and are ready to lay eggs as soon as the rainy season starts and the ponds fill up. Mosquitoes are a great example of this - in my research, I would go one day and find an almost-empty pond. The next day, it's filled with mosquito larvae. Frogs and toads do the same.
kawtharjordan:
r u sure this is right???
what about #2
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1. Natural selection is a mechanism by which populations adapt and evolve. In its essence, it is a simple statement about rates of reproduction and mortality: Those individual organisms who happen to be best suited to an environment survive and reproduce most successfully, producing many similarly well-adapted descendants. After numerous such breeding cycles, the better-adapted dominate. Nature has filtered out poorly suited individuals and the population has evolved.
2. No
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