Question

Which of the following is/are true?

A. The fungal pathogen Mycosphaerealla graminicola is found worldwide with its host, cultivated wheat. Mycopharealla graminicola is host specific and does not occur on other host species such as Barley.
The closest known relative of M. graminicola is a barely-adopted pathogen Septoria passerinii.
You are researching these fungi and have the following hypothesis: If M. graminicola and 5 passerinii both had a common ancestor that lived in one geographic area where wheat and barley grew, it may be possible that the ancestor gave rise to these two species in one geographic location. This would be classified as sympatric speciation.
Your hypothesis and definition of sympatric speciation is correct.
B. A flood causes the loss of all red-headed males ducks in a population. This is an example of sympatric speciation.
C. A plant species obtain an extra set of homologous chromosomes. This would be an example of sympatric speciation.
D. Sympatric speciation may be due to sexual (mate) selection.
E. Sympatric speciation can occur when a single species occupies the same geographic location.

Answer 1

E: Sympatric speciation can occur when a single species occupies the same geographic location

Answer 2

Answer: Option A,C,D and E.

Step-by-step explanation:

Sympatric speciation is the isolation or evolution of new species from the original population living in the same geographical location. Sympatric speciation normally occur as a result of sexual selection of mates. Individual species tend to choose sexual mates base on some characteristics possessed and this lead to reproductive barrier. A plant with extra set of homologous chromosomes is an example of sympatric speciation. New species normally arise from common ancestors.