(a) A pollen grain containing the two sperm cells. It produces a pollen tube, which arrives at the ovule. After the arrival, one of the synergid cells degenerates and the pollen tube bursts to ...

Back in the day, IVF was spoken about in hushed tones, in hurried gossips, in embarrassed voices. Today things are different. IVF is a common term. People know that it is a complex procedure ...