Species evolve over time based on their environment.
If part of a group of a species gets isolated into a new environment, then both species (the initial environment and the new one) will evolve differently because of their different environments and in result become different.
So since they both evolve differently based on their different surroundings, the group that was isolated becomes a new species.
Answer:
According to the concept of entropy, the thing that will likely happen to most molecules over time is that they will breakdown. The molecules are normally very loosely connected and this helps them to breakdown.hope this is helpful!
Sexual, this is because during sexual reproduction both DNA of the parents is mixed to create an offspring.
Asexual reproduction is almost like a copy of the parent, there is no external DNA going into the production of the offspring.
In modern terminology, mendal's heredity "factors" are called
phenotype
