A:Organisms were able to find niches that were best suited to their needs.
B:The fittest organisms took advantage of new resources.
C:The strongest organisms beat out the competition for resources.
D;The least fit organisms occupied new niches.
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As Organisms First Evolved, How Did Natural Selection Contribute To Biodiversity?
Posted on July 16, 2011.
Its B. Fitness in evolutionary terms means the organisms that leave behind the most offspring and in early days of life on earth, having many available niches let the more offspring survive by providing more niches for them to adapt to.
A is wrong because organisms don’t seek out niches that suit their needs. Instead over many generations they adapt to niches. C is wrong because strength is only one feature that allows organisms to adapt. Sometimes being smaller and weaker is more advantageous (being able to hide in small crevices while the big, strong organisms are exposed to weather, predators, etc.). D is wrong because the least fit organisms are the ones that are least able to leave offspring behind and tend to become extinct.