Protection of plants. Insects and plants

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During biological evolution floral plants and insects have appeared independently from each other, but they in many respects co-operated among themselves and evolved in common. It is impossible to consider evolution of each of these groups as result of independent development in time; apparently, took place koevoljutsija at which the gradual changes remaining in one of groups, appeared favorable for another and on the contrary. Especially distinctly it is shown in interrelation between tsvetkami and insects-opyliteljami. Tsvetki deliver to insects food - pollen and nectar; insects in turn carry out cross-pollination tsvetkov, promoting genetic rekombinatsii and providing to the given kind of plants the variability, necessary to resist to environment changes. The plant does not allocate, of course, nectar ' intentionally ', on purpose to involve insects, and the insect does not realise that it transfers pollen from a flower on a flower, promoting that to formation of seeds; however these interrelations which have casually arisen in the course of evolution between a plant and insects provide their fine biological conformity each other and appear favourable to both parties. At some plants have appeared in the course of evolution tsvetki absolutely special form facilitating entomophily. Often meet brightly painted and strongly smelling tsvetki. Bees perceive not only visible light, i.e. The colours accessible to a human eye, but also and ultra-violet radiation. If to photograph tsvetki on a film sensitive to ultra-violet radiation we will see them ' eyes of a bee '. Thus they will look absolutely for us unusually;

Any lines converging to nektarnikam at the basis of petals and, obviously, directing a bee directly to a food source will be found out. these ultra-violet marks, possibly, help also to a bee to distinguish numerous types tsvetkov which in visible light seem very similar; thanks to it the insect can, obviously, to collect homogeneous nectar and to carry out pollination in limits only one kind of plants.

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