(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 ...
The protein RGS2 can delay an egg’s development into an embryo in order to allow time for sperm to arrive and merge with the egg in a healthy fertilization process. The embryo cannot survive without ...
Infertility is a challenge that many couples face and it can affect both men and women. There are various reasons for infertility, such as hormonal imbalances, low sperm count, blocked fallopian tubes ...
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