I don't have enough information but it could be natural selection or mutations.
The flower mechanism that would not help them preventing pollination by a specie such as a foreign plant would be that the flowers of different species are then the same color and would attract the same pollinators.Hope this would be of help.
Answer:
The first flower can self pollinate because it is open, so the wind will pollinate it.
Explanation: Flower b will not self pollinate because it is not open, so it will not pollinate until a bird or moose or any other animal comes and eats it, then poops it out, so the seeds get planted.
✴ It actually can depends on the baby's gentics.
✴ But, I'd say approximately 18 to 22 inches for the all-'round average baby
In the nucleus, the part on the cell that contains all the genome
