sperm bearing male gametophyte of gymnosperms and angiosperms.

A fine powder that contains pollen grains-or male reproductive cells, also called "spores." Pollen is produced by seed plants.

the powder inside a flower that can make seeds grow The bee carries the pollen from flower to flower.

Fertilizing (reproductive) element of plants (same role as sperm). Fine, powdery particles, sometimes in clumps.

The fine powder produced by the anther inside a flower that contains the male sperm cells.

The male fertilizing agent of plants that consists of microscopic, powdery granules.

A fine material made of grains produced by the male organs of seed plants (anthers on stamens) to fertilize the female organs (stigmas on pistils). Pollen can also trigger allergies.

Pollen, essentially, contains the male gametophytes (sex cells). It is produced in the anther. See also: pollination.

Tiny grains involved in plant reproduction.

The yellow dust produced by the anters. It is the male element which fertilized the ovule.

Microscopic particles released from trees, weeds, grasses, and flowers meant to fertilize parts of other plants. The lighter ones, commonly ragweed, Kentucky bluegrass, Bermuda grass, oak, ash, elm, and several others, travel easily through the air, especially on sunny, windy days. Samples of ragweed pollen have been collected 400 miles out at sea and two miles up into the atmosphere.

Grains released from anthers containing the male element necessary for fertilisation.

The male cells or microspores produced by the stamens.

yellow powder-like material on the anthers which is necessary for a plant to reproduce

The powder produced by seed plants, and most plentiful in Spring. A common cause of allergic reactions.

the yellow powder made by flowers to fertilize flower seeds

On African Violets, the light yellow, powdery substance which is produced in the anthers and which fertilizes the ovules to make seeds.

( Linnaeus, 1751) The microgametophyte of seed plants, developed from the microspore. See also: spore, microspore.

The male 'dust' produced by a flower on the anther to fertilise other flowers.

powder produced by the stamen that is needed by the pistil to make seeds

Pollen is the name commonly given to the dust-like material found in flowering plants and other groups of plants such as gymnosperms and cycads. It is produced by the pollen sacs of the anthers in massive quantities, and shed when these sacs burst. It is either spread by the wind or by some pollination vector such as insects or bats. Individual pollen grains are microscopically small, and so what is normally known as 'pollen' is actually a mass of pollen grains stuck together for mass transport.

Pollen-grain. Contents of the anther. See Microspore.

The male gametophyte of gymnosperms and angiosperms.

a sticky powder inside flowers that makes seeds grow The bee carries the pollen from flower to flower.

Microscopic spores generated by higher flowering plants

A fine, dustlike powder discharged from the male part of a flower. The grains contain the mature germ cell that fertilizes the female part (ovule) of a flower.

A fine, powdery substance released by plants and trees.

The microgametophyte of seed plants, enclosed in the microspore wall. In fossil pollen, only the microspore wall, or exine, remains after lithification removes the microgametophyte and intine. Similarly, the exine is all that remains after acetolysis of modern pollen.

n. (L. pollen, pollis, fine flour) the male or fertilizing element of seed plants, consisting of fine yellowish powder formed within the anther of the stamen.

The male reproductive cells of flowers. Bees collect pollen to use as food for their young. It is the protein part of a bee's diet.

A mass of tiny particles in a seed plant that fertilize the seeds and usually appear as fine yellow dust.

Pollen Pollen, m Polen The spores, male, borne by the anthers.

Microscopic particles from the male flower that can fertilize the female flower to produce seed. Allergenic pollen is usually from wind-pollinated plants.

Pollen is the male reproductive part of trees, grasses and weeds. Pollen allergens are carried by the wind, and when inhaled can cause an allergic reaction in the lungs or nose, leading to asthma and allergy symptoms. In general, tree pollens are present in the early spring, grass pollens in the late spring, and ragweed pollens in the late summer.

Spores in a seed plant usually appearing as a fine dust. Pollen is a common asthma trigger.

Very small dust-like grain produced by flowers. These are the male germ cells of the plant.

Minute grains, usually powdery, containing the male sex cells of gymnosperms and flowering plants. [GT

a mass of microspores in a seed plant appearing usually as a fine dust What is an Ecosystem

The powdery dust from the parts of a male flower. Pollen is necessary to pollinate the ovary of a plant to make seeds. Pollen is also collected by some insects as food for their offspring.

dust like grains on the tops of anthers containing the flower's sperm

The part of the male reproductive organ that contains sperm and is carried to other flowers.

The fine powderlike material produced by the anthers of flowering plants or flower in the process of fertilization.

(paul-len) - a fine powder produced by grass, trees and weeds that causes allergic reactions and hay fever.

Pollen is the fine powder like material that is produced by the anthers of seed plants. Pollen is comprised of the fine spores from a male flowering plant. Plants cannot produce seeds without the male and female plants each contributing genetic material. Pollen, floating on the wind or being carried from plant to plant by insects, assures the fertilization of female flowers, which will then produce seeds.

A collective term for pollen grains.

fine, yellow, dust-like microspores containing male genes.

contains the male sex cell of a flowering plant

A fine powder made by flowers. With flowering plants, pollen must get from one flower to another flower for a plant to make fruit. Most plants depend on bees or other insects to "pollinate" flowers.

Tiny male fertilizing agent of flowering plants, trees, grasses and weeds. Airborne pollen is a major allergen responsible for hay fever.

The dust like product of the anther.

The male reproductive cell of a plant. Serves as one source of protein for hummingbirds that pick up pollen when they visit flowers to get nectar.

The word pollen is derived from the Latin word meaning fine flour or dust. Pollen is a collective noun that is treated as singular. A single individual is a pollen grain. A pollen grain is a microscopic plant that carries the male genome, which is one-half the genetic complement of the parent plant. The pollen grain produces the sperm that fertilizes the ovum, or female genetic complement, of the plant. The fertilized ovum develops into a seed.

Very fine granular material that bees gather from flowers. Can be found in strained honey, but is removed by filtration (to improve clarity).

The fine, powder-like material produced by the anthers of flowering plants, and functioning as the male element in fertilization.

The powdery reproductive material released into the air by male flowering plants. Pollen from trees, grass, and weeds is a common cause of allergies.

the powdery particles produced by trees, grasses, flowers, and weeds that are used in reproduction. Pollen can be carried by the wind, collected on hair and clothing, and transported by shoes. Inhaling pollen often stimulates allergic reactions.

The dust-like male reproductive cells (gametophytes) of flowers, formed in the anthers, and important as a protein source for bees; pollen is essential for bees to rear brood.

The male gametophyte. Pollen grains give rise to sperm.

A powdery substance given off by plants and trees that causes many allergic reactions.

hae The male reproductive part of a flower.

powdery grains needed by a plant to make seeds

The male gametophyte. Minute, powdery grains produced by anthers and male cones of seed plants; collective term for pollen grains.

the fertilizing powder or male elements held by the anthers by of which the ovules are fertilized.

the male reproductive part of a plant that contains the sperm.

1. The fertilizing element of flowering plants. 2. Background air pollutant.

Plants produce microscopic round or oval grains to reproduce that are called pollen, which can cause allergic reactions in some people.

The powder-like matter produced by the anthers which functions as the male element in pollination.

Male semen of plants.

the grains that contain the male reproductive cells of a seed plant.

The spores or grains borne by the anther of a spermatophyte.

The dust-like male spores in the anther.

Powdery grains which bear the sperm and are produced in the anther.

The cells that carry the male DNA of a seed plant.

the microspores of seed plants; the powdery mass of microspores shed from anthers.

powder-like grains which form on the anther.

Substance found in flowers and harvested by bees. Contains all 22 amino acids and 96 other nutrients. Helps boost energy and endurance and speeds up recovery time.

the fertilizing powder produced by the anthers. It is this male element that fertilizes the ovule (Latin Pollen -inis fine flower)

The tiny spores or fine powder produced by grasses and flowering plants. Airborne pollen is a major allergen responsible for hay fever.

Small, light, dry protein particles from trees, grasses, flowers, and weeds that may be spread by the wind. Pollen particles are usually the male sex cells of the plant, and are smaller than the tip of a pin. Pollen is a potent stimulator of allergic responses. It lodges in the mucus membranes that line the nose and in other parts of the respiratory tract, causing irritation and histamine reactions. See the entire definition of Pollen

Pollen grains that are made up of microspores containing a mature or immature male gametophyte.

The male gametes, which are produced in the stamens of flowering seed plants.

Male seed of flower.

Equivalent of sperm in plants. Pollen grain fertilizes plant ovules.

Fine particles containing the fertilizing element of plants (male) formed by the anthers of plants. Most allergies are caused by grass and tree pollens.

dust-like body produced by the anther which houses the male sex cell of the flower.

the male gamete from a seed plant

Male fertilizing agent of flowering plants, trees, grasses and weeds. Pollen is a central cause of many allergic reactions.

The male gametes in higher plants are contained in small pollen grains.

The plant equivalent of sperm produced in abundance by anthers, the male reproductive organs found in most flowering plants. Immature pollen grains called microspores have significant biotechnological implications.

The male element in flowering plants; usually a fine dust produced by the anthers, which, by contact with the stigma effects the fecundation of the seeds. This impregnation is brought about by means of tubes (pollen-tubes) which issue from the pollen-grains adhering to the stigma, and penetrate through the tissues until they reach the ovary. 166

Pollen is the powdery, yellowish grain derived from seed plants that develops into the male reproductive cell.

grains that contain the male reproductive cells of seed plants.

the male reproductive cell bodies produced by anthers of flowers, collected and used by honey bees as their source of protein.

reproductive grains contained in stamens (male)

A mass of microspores in a seed plant appearing usually as a fine dust (in flowering plants, formed in the anthers that produce the male cells).

the mass of microspores in a seed plant that usually appears as a fine dust and is the agent of pollination.

the microspore of seed plants that contains the microgametophyte (male gametophyte)

Minute powder-like grains borne by the anther. Pollen contains the male gametophyte of a plant.

The fine powder carried by the anthers of the stamens.

the microspores that carry the male gametophyte of seed plants.

the male gamete of a flowering plant which typically contains two sperm nuclei capable of fertilizing an egg.

Male seed of plants, flowers, and trees causing hay fever, asthma, and allergic reactions.

A fine, powdery substance given off by plants and trees. Pollen is a common asthma trigger.

minute grains containing the male germ cells and released by the stamens.

Developed by the anther, the dust-like grains of pollen have a distinctive shape and elaborately sculptured outer wall. Pollen grains contain two cells, one of which forms a pollen tube with two sperm cells.

The sperm-making organs of plants.

is the male "seed" of a plant that appears as a dust. It can be transferred by insects or by wind for plant reproduction.

pollen corresponds to the microspores of flowering plants (which develop on the stamen). Certain forms of pollen which are carried by the wind during the pollen season are extremely allergenic.

The male 'seed' of plants (grasses, flowers, trees) that consists of microscopic dust-like particles. Can cause hay fever, conjunctivitis and asthma.

Gamete of a flowering plant, similar to sperm cells in mammalian organisms.

The male fertilizing element of flowering plants.

Pollen, sometimes incorrectly called flower sperm, is a fine to coarse powder consisting of microgametophytes (pollen grains), which produce the male gametes (sperm cells) of seed plants. Each pollen grain contains vegetative cells (only one in most flowering plants but several in other seed plants) and a generative cell containing a tube nucleus (that produces the pollen tube) and a generative nucleus (that divides to form the two sperm cells). The group of cells is surrounded by a cellulose cell wall and a thick, tough outer wall made of sporopollenin.