several statements are confirmed as correct: insects that take rewards without pollinating are known as pollen/nectar robbers ; pollen-pistil interaction is a chemical dialogue that regulates germination and growth ; and reptiles like geckos and garden lizards have been documented as pollinators . The fourth statement is incorrect because while the pistil identifies compatible pollen, multiple grains of the same (compatible) species can germinate on the stigma simultaneously, and many pollen tubes can grow through the tissues of the style towards the ovary .