It means that the atom or the group of atoms became positive ion by losing two electrons Ex.
A. The pollen or seeds gets stuck to the animals feathers or fur, spreading the plants area.
There is not any nucleus and nuclear bound organelles in prokaryotes....
The third option "Rhyolitic" would be your answer.
Most of their diet was various meats, however as agriculture was developed they began to eat more grains/vegetables.