How to use Cross-pollination in a sentence
Cross-pollination may occur between two flowers on the same plant (geitonogamy) or between flowers on distinct plants (xenogamy).
Flowers are normally self-pollinated but there is a short period when insects can effect cross-pollination.
Sprengel came very near to appreciating the meaning of cross-pollination in the life of plants when he states that "it seems that Nature is unwilling that any flower should be fertilized by its own pollen."
The spread of genes linked to this promoter by ordinary cross-pollination or by horizontal gene transfer will have enormous impacts on health and biodiversity.
The cleistogamous flowers are developed before or after the normal open flowers at seasons less s-- favourable for cross-pollination.Advertisement
The separation distances for the FSEs have been set to ensure that cross-pollination is a maximum of 1% .
The following program was also about showing the cross-pollination of some of the pyramids built on just one continent, the African continent.
The GM crops used in the FSEs are separated from any nearby conventional or organic crops to minimize cross-pollination.
Organic organizations say that cross-pollination could take place between the GM maize and the organic sweetcorn grown at Ryton.
The next step requires the identification of some elements in the claims that might constitute evidence of such cross-pollination.Advertisement
It is important that the evaluations themselves should not result in any unacceptable cross-pollination.
These results cannot be fully explained in terms of simple cross-pollination.
Mother Nature prefers cross-pollination and has some clever tricks to promote this, like ripening the male and female germ cells at different times.
Cross-pollination of crops is a very real problem - only a corporate lackey or complete idiot would deny this.
This is associated with the fact, so ably demonstrated by Darwin, that, at any rate in a large number of cases, cross-pollination yields better results, as measured by the number of seeds produced and the strength of the offspring, than self-pollination; the latter is, however, preferable to absence of pollination.Advertisement
Some fruit trees require cross-pollination and companion plantings.
Cross-pollination needs to occur with a suitable variety.
Seeds of Change also develops original varieties of plants using traditional methods of cross pollination and choosing only the most vigorous plants from which to collect seed.
Today scientists and biologists are working together to perfect robobees for cross pollination and to help find survivors after disasters.
In bisexual or hermaphrodite flowers, that is, those in which both stamens and pistil are present, though self-pollination might seem the obvious course, this is often prevented or hindered by various arrangements which favour cross-pollination.Advertisement
Selfpollination frequently becomes possible towards the end of the life of a flower which during its earlier stages has been capable only of cross-pollination.
Even in homogamous flowers cross-pollination is in a large proportion of cases the effective method, at any rate at first, owing to the relative position of anther and stigma or the fact that the plant is self-sterile.
In the case of unisexual flowers, whether monoecious, that is, with staminate and pistillate flowers on one and the same plant, such as many of our native trees - oak, beech, birch, alder, &c., or dioecious with staminate and pistillate flowers on different plants, as in willows and poplars, cross pollination only is possible.