The type of fossil pollen grains present in the area may be helpful in the exploration of
Coal
Petroleum
Fossil pteriodophytes
All the above
It’s obvious.
identify different ovules of diagrams $A$ to $F$
The structures which guide the pollen tube into synergid is
Vivipary automatically limits the number of offsprings in a litter. How ?
Transfer of pollen to the stigma of another flower of the same plant is called.
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