Respuesta :
Lord howe island has two species of palm tree in Tasman sea which do not evolve in evolutionary process because Genetic Drift between the two species is not occurring. Thus the correct option is genetic drift of Howea forsteriana.
What is genetic drift?
Genetic drift is the random process which lead to large change in the population over a period of time. It is process which refers to the transfer of genes from population to the other due to migration or reproduction.
It is an evolutionary process which leads to change in the species which causes genetic variations. In Howea Forsteriana and Howea Belmoreana species interbreed do not take place because there is a lack of genes flow between them.
Thus genes flow is the process which is not taking place in the above scenario.
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The evolutionary process that is not happening in the scenario mentioned is Hybridization.
What do you mean by Hybridization?
A method via which species can mate with every other and bring fertile offspring hence growing a brand new species is known as Hybridization.
This is not always going on with the two palm species on the island. This can be because of prezygotic boundaries that prevent those species from mating and generating a zygote (fertilized egg cell).
Therefore, In essence, those boundaries prevent any gene glide among the two species.
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