Which of the following statements is true? A flower can only have one stamen.

During fertilization, pollen grows a tube down into the ovary.

Pollen is created by the stigma.

Self-pollination creates a wider variety of plants than cross-pollination.

Density-dependent limiting factors include:•   competition•   predation•   parasitism•   disease
Density-dependent factors operate only when the population density reaches a certain level. These factors operate most strongly when a population is large and dense. So the answer is B water the more animals the less water there is available.