When the Grand Canyon formed, many small mammal population were divided. Some members of the population were on one side and oth
ers are on the other, therefore, they were not able to mate with one another. Over time this separation and inability to mate with one another led to the emergence of new species. This type of speciation is called A) sympatric speciation.
B) allopatric speciation.
C) parapetric speciation.
D) peripatric speciation.
We have been given that different tissue samples are in their respective stage of cell cycle.
Ans is option B because cancerous cells tend to divide indefinitely regardless of the presence or absence of growth factors. In cancerous cells G0 check points fail and the cells are always in some stage of mitosis i.e. cell is supposed to be in any of the following stages of mitosis :
