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The factors in the evolution of any organism are too numerous to list. After all, natural selection guided not just the evolution of the giraffe from its immediate precursors, but also the evolution of those precursors to their precursors, and so on. But if you're asking why the giraffe evolved such a long neck, then there are a number of hypotheses to consider. For instance, the giraffe's neck might have lengthened due to competition over foliage (food) with other grazers. Or it might have lengthened due to sexual selection - potential mates favouring those competitors who might win a headfight with a rival. Or it might have evolved due to the pressure of predation - those giraffes with a longer neck sooner being able to spot a predator. Any of these is possible - and it might be that the giraffe's neck evolved due to a combination of these.
What else can I help you with?
What process in which organisims with traits well suited to an environment are more likely to survive and to produce offspring is?
This process is called natural selection. It is the mechanism by which traits that provide a survival or reproductive advantage to an organism become more common in a population over time.
What comes first mutation or natural selection?
Natural selection can only work on genetic variation that already exists. So mutation comes first, then natural selection.
How has the natural selection harmed the ecosystem?
It hasn't. Natural selection is a key part of the ecosystem itself.
What does natural selection have to do with biodiversity?
Natural selection is the mechanism primarily responsible for the development of today's biodiversity.
Is Natural selection a source of genetic variation in a population?
No, natural selection works on that genetic variation presented to it.
What is the name for the process in which the organisms best adapted to their environment survive?
Its NaTuRaL sElEcTiOn if you didn't know.
What is the selection pressure for elephants having large ears?
yes elephants have large ears to cool down.
Adaptation which allows for natural selection is called?
Adaptation does not allow for natural selection: natural selection causes adaptation.
What is the prefix and suffix of natural selection?
The prefix of natural selection is "natural" and the suffix is "-tion".
How does genetic variation support Natural Selection?
Genetic variation in itself does not 'support' natural selection: it is what natural selection acts upon.
The mechanism by which organisms evolve is known as?
Natural Selection
What principles includes variation and competition?
Natural selection.
What is another term for the surivival of the fittest?
Natural selection
What was Darwin's overall conclusion regarding natural selection?
That selection was natural.
Is natural selection a form of adaptation?
Natural selection is what causes adaptation.
Is natural selection an example of macroevolution?
No, natural selection is the mechanism that drivesevolution.
The process by which individuals that are better adapted to their environment are more likely to survive and reproduce is called?
natural selection
