Pollination | Definition, Process, Types, Agents Of, & Facts
Dec 2, 2024 · Pollination is the transfer of pollen grains from the male stamens to the ovule-bearing organs or to the ovules (seed precursors) themselves. As a prerequisite for fertilization, pollination is essential to the production of fruit and seed crops.
Pollination - Insects, Wind, Animals | Britannica
Dec 2, 2024 · Pollination - Insects, Wind, Animals: The ancient principle of trapping insects as a means of ensuring pollination was readopted by some advanced families (e.g., orchids and milkweeds), and further elaboration perfected the flower traps of primitive families.
major types of pollinators - Encyclopedia Britannica
Although wind has long been important for the pollination of many gymnosperms and some flowering plants, evolution gave rise to the use of more-efficient animal pollinators—namely, insects, birds, and mammals. Read on to learn about some of the major types of pollinators and the “pollinator syndromes” (suites of flower traits) of the ...
pollination summary | Britannica
Since the pollen-bearing parts of the stamens are rarely in direct contact with the pistil, plants commonly rely on external agents for pollen transport. Insects (especially bees ) and wind are the most important pollinators; other agents include birds and a few mammals (notably certain bats).
Pollination - Butterflies, Moths, Insects | Britannica
Dec 2, 2024 · Pollination - Butterflies, Moths, Insects: The evolution of moths and butterflies (Lepidoptera) was made possible only by the development of the modern flower, which provides their food. Nearly all species of Lepidoptera have a tongue, or …
Conifer - Pollination, Wind, Insects | Britannica
The pollen grains of families that lack prothallial cells are more or less spherical, lack air sacs, and can extend a pollen tube anywhere on their surface so that precise orientation is unnecessary. Some conifers lack a pollination droplet mechanism.
Mechanisms that prevent self-pollination - Encyclopedia Britannica
Dec 2, 2024 · Pollination - Self-Incompatibility, Isolation, Cross-Pollination: Not surprisingly, many species of plants have developed mechanisms that prevent self-pollination. Some—e.g., date palms (Phoenix dactylifera) and willows (Salix species)—have become dioecious; that is, some plants produce only “male” (staminate) flowers, with the rest ...
Pollination - Birds, Flowering Plants, Nectar | Britannica
Dec 2, 2024 · Pollination - Birds, Flowering Plants, Nectar: Because the study of mechanisms of pollination began in Europe, where pollinating birds are rare, their importance is often underestimated. In fact, in the tropics and the southern temperate zones, birds are at least as important as pollinators as insects are, perhaps more so.
Cross-pollination | Definition, Plants, Mechanism, & Facts | Britannica
Nov 29, 2024 · Cross-pollination is a type of pollination in which sperm-laden pollen grains are transferred from the cones or flowers of one plant to the egg-bearing cones or flowers of another. Cross-pollination is found in both angiosperms and gymnosperms and facilitates cross-fertilization and outbreeding.
pollination - Students | Britannica Kids | Homework Help
In botany, pollination is the process by which pollen grains are transferred from the stamens (the male parts of a plant) to the pistil (the female structure). There, a sperm cell from the pollen joins with an egg cell, and fertilization occurs. The fertilized cell then develops into a seed.