Ring species
What is a cline forming a circular shape forming called?
ring species
When does Allopatric occur
Once after a population becomes geographically isolated
When does sympatric occcur?
It occurs due to change in the niche or lifestyle of the organism
What sudden appearance is this refered to?
A new species
When does this mechanism take action?
Before the egg is fertillzed
A wide geographic area.
Why are they geographically isolated?
Due to environmental events such as geological uplift or change in sea levels
What can develop overtime?
Genetic development, leading to reproductively isolation
What happens to the plant whe. it acquires a extra set of chromosomes?
It becomes reproductively isolated from the parent plant population
When can two related species breed?
At the different times or during the year to produce pollen
What is the offspring ability to reach ,maturity but sterile, meaning they cannot have offspring of their own called?
Hybrid sterility
What happens once a subset of the population is separated from the main population?
The gene flow ceases
Why is it possible for sypatric to be a new species?
By arising without geographical isolation.
What do these polyploid plants must produce?
Asexually
What are reproductive structures that genetically controlled specific to?
A Pollinator