I'm not completely sure but I think the answer is the last one. The living things need water because it is a major component of a cell membranes answer.
During photosynthesis, plants use carbon dioxide and water to make sugar and oxygen. Some of this sugar, which is found in a variety of hydrocarbons, is recycled within the chloryphll.
The pollen grains contain sperm which will fertilize the egg and create a seed to sprout the next generation of plants. The main male part is the stamen. It is divided into two parts: the anther and the filament. The anther produces the pollen grains that contain the sperm needed for fertilization.
Molecular biology!! Anatomy would require a organism not just a fossil.
