From this one migrant species would come many -- at least 13 species of finch evolving from the single ancestor.
This process in which one species gives rise to multiple species that exploit different niches is called adaptive radiation. The ecological niches exert the selection pressures that push the populations in various directions. On various islands, finch species have become adapted for different diets: seeds, insects, flowers, the blood of seabirds, and leaves.
The ancestral finch was a ground-dwelling, seed-eating finch. After the burst of speciation in the Galapagos, a total of 14 species would exist: three species of ground-dwelling seed-eaters; three others living on cactuses and eating seeds; one living in trees and eating seeds; and 7 species of tree-dwelling insect-eaters.
Scientists long after Darwin spent years trying to understand the process that had created so many types of finches that differed mainly in the size and shape of their beaks.
<span>Alleles are each of two or more alternative forms of a gene that are found at the same position in a chromosome. Traits on the other hand, are the characteristics that are defined by genes. So the combination of alleles for a gene is what manifests itself into a trait.</span>
The answer should be 3
Explanation:
One plant will for sure have red leaves, while the other two have a probability of having red and yellow leaves, and one plant will only have yellow leaves.
Yellow: Y
Red: y
Two plants: Yy
Although the Red is recessive so it's a smaller chance of it overpowering the yellow, the answer might also be 1.
<span>B. energy is lost at each level as heat, which increases randomization
</span>
Answer:
A. Excess fertilizer is washed into local streams,
causing an overgrowth of algae.
Explanation:
