The nucleus of the pollen grain passes through the pollen tube and joins with the egg cell inside an ovule in the ovary. Fruit comes from flowering plants, and it is grown in the following process ...

The pollen grain then germinates into a tube that guides the male reproductive cells to the depths of the ovary, picking up signals along the way that reveal the location of an ovule. Blocking signals ...

To its right is a 3.4-millimetre-wide cross-section of a blue passion flower (Passiflora caerulea) ovary, stuffed with mature ...

The inner whorl consists of two solid or closed ovule-bearing carpels, in which the loculus has disappeared by reduction. 2. The evidence for this rests chiefly upon the vascular structure of the base ...