Pollen tube growth is one of the most fascinating—and essential—phenomena in the life cycle of flowering plants. After a compatible interaction between pollen grains and the stigma surface, the pollen germinates and forms the pollen tube, which grows through the stigma, style, and transmitting tract to deliver the sperm cells to the ovule."
2) Although pollens of many species germinate in simple aqueous media, stigmas do not provide satisfactory sites for the germination of most foreign pollen... Stigmas not only provide the proper conditions for the germination of pollen from their particular species, they actively inhibit the germination of pollen of many unrelated species.
The cell’s DNA is replicated or copied before cell division because it is important for the cell to have 2 DNA molecules because the cell is going to divide into 2. Each new cell need a 1 DNA
Answer: Hypothesis
Explanation:
A hypothesis is a proposed explanation for any phenomenon. The hypothesis is given before the experiment is being performed.
In this case the it is said that presence of water could accelerate the growth of mold.
This is a hypothesis because it has not been proved by the experiment it is just a proposed explanation which is given before the experiment.
This is known as the hypothesis which can be accepted if experimentally proved and can be rejected if not proved.