Answer:
Parapatric speciation
Explanation:
There are different types of speciation. Parapatric speciation consists of new species evolving from a continuous distribution. That is, there is no physical barrier that might impede the gene flow, in fact, it might continue during the speciation process.
There is an environmental gradient that determines different phenotypes for different environmental conditions. One phenotype is more adapted to one of the distribution extremes than the other phenotype. In the exposed case, the environmental gradient is given by the differences in pH.
In the border between the environmental extremes, there is the primary hybrid zone, where both phenotypic forms might meet and hybridize.
A. theory because it is an explanation that is supported by extensive observations, experimentation, and reasoning.
Explanation:
Evolution can best be described as a theory because it is an explanation that is widely supported by extensive observations, experimentation and reasoning.
Theories are formulated after careful observation into a particular phenomenon.
- Most theories provides a vivid explanation into an observed event or process.
- The theory of evolution is one of such theories that suggests that an organism changes in order to adapt to its environment.
- Some of the key figures who contributed to the study of evolution are J. B Lamarck, Charles Darwin, Williams Smith e.t.c
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Answer:
Definition:
Biological evolution is the process through which the characteristics of organisms change over successive generations, by means of genetic variation and natural selection. It is most commonly defined as "changes in gene frequencies in populations."
A small change in genes could result in a mass epidemic. Such as the colinistists bringing yellow fever over to America.
Explanation:
Biological evolution refers to the cumulative changes that occur in a population over time. These changes are produced at the genetic level as organisms' genes mutate and/or recombine in different ways during reproduction and are passed on to future generations.
