The correct answer is - accident.
In general, the invasive species are introduced into a new environment accidentally.This means that they have not been introduced on purpose, or in order to cause any harm to the ecosystem, though there are some exceptions.
The invasive species are usually very dangerous to the local ecosystem. The reason for that is that they usually do not have predators in the new ecosystem, or if they are the predators, than the local flora and fauna do not have defense mechanisms to cope with it. They also act very aggressively, have more offspring, as well as having the offspring on much shorter periods of time, which ends in occupying the space of the local organisms and even leading to their extinction.
Photosynthesis is the process whereby oxygen is produced and is released into the atmosphere.
What are the areas? There are no options
The answer is skin cells. Other cells, like nerve and brain cells, divide much less often.
<span>Diversity of the species. Asexual reproduction is in effect a form of cloning - in that the offspring are created from the 'mother' - and contain only one set of genes. Sexual reproduction - is the joining of an egg and sperm from two different parents - thus 'mixing' the genes from both donors. Hope this helps, good luck. </span>