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.
Seedcoat protect the seed during unfavourable conditions.
The right answer is metabolism.
Metabolism defines the set of coupled reactions occurring in the cells (eukaryotes and prokaryotes). It consists of two opposing mechanisms:<u>*Catabolism:</u> it allows the extraction of energy from nutrients, by degradation of energy molecules (carbohydrates, lipids ...);<u>*Anabolism:</u> it makes it possible to synthesize the constituents necessary for the structure and the good functioning of the cells.
B. Ability to neutralize acid
Scientists use the pH scale to measure how basic or how acidic a solution is. If a solution is measured at a 7 on the pH scale, the solution is neutral. Any solution that is measured less than 7 is more acidic, while any solution measured more than 7 is is more basic.