The type of fossil pollen grains present in the area may be helpful in the exploration of
Coal
Petroleum
Fossil pteriodophytes
All the above
Fusion of a male gamete with the secondary buicleus forms the
The number of nuclei in a mature embryo sac are
Exalbuminous seeds are of
Majority of pollen grains are shed at
In which of the following, parthenocarpy makes no sense?