Answer:
The movement of ions or molecules across a cell membrane into a region of higher concentration
3. naturally occurring
4. fossilized plants or air bubbles ( probably the plants tho)
5. increased
6. the green house effect occurs naturally, it is being polluted both naturally and unnaturally, the unnatural pollution is contaminating our 'greenhouse" and that is horrible.<span />
The correct answer is D. The theory of natural selection provided a better explanation of the processes that were being observed by the scientists.They observed that the related species birds found on one island were slightly different from that of the other, and certain portions earth, have the species, which were not found anywhere else.
Urbanization creates its own forms of water stress via increasing per capita water consumption and rising incomes, as wealthier people use more water, energy, and water-intensive goods.
Explanation:
