What is the difference between pollination and fertilization in flowering plants quizlet

Distinguish between pollination and fertilization. Answer: Pollination is the transfer of pollen grains from anther [male part] to the stigma[female part] of a flower. Pollination leads to fertilization. Fertilization is the fusion of male and female gametes [ here pollen grains and ovaries] resulting in the formation of zygote.

Self-pollination occurs when the pollen from the anther is deposited on the stigma of the same flower, or another flower on the same plant. Cross-pollination is the transfer of pollen from the anther of one flower to the stigma of another flower on a different individual of the same species. Self-pollination or cross pollination can be an advantage when the number of flowers is small or they are widely spaced.

During self-pollination, the pollen grains are not transmitted from one flower to another. As a result, there is less wastage of pollen. Flowers are generally small, less attractive and without nectar. Less number of pollen grains are required. Seed Produced through self-pollination are small, light in weight and less in number. Progenies of self-breeding plants exhibit less vigour.

Disadvantages of cross-pollination There is a high wastage of pollen grains that need to be produced to ensure fertilization occurs. There are high chances that the good qualities may get eliminated and unwanted characteristics may get added due to recombination of the genes. Flying insects are the most common pollinators. In addition to butterflies, bees and moths, many species of beetles, and flies are important pollinators. The Advantages Of Cross-pollination are as follows: Offsprings produced are healthier.

New varieties can be produced through cross-pollination of two varieties of the same species or two species. Seeds that are produced are abundant and viable. Cross-pollination, also called heterogamy, type of pollination in which sperm-laden pollen grains are transferred from the cones or flowers of one plant to egg-bearing cones or flowers of another.

For example, a popular hobby is to cross pollinate tomato varieties to attempt to create new, better varieties. In these cases, the varieties are purposefully cross pollinated. Answer: Pollination is the transfer of pollen grains from anther [male part] to the stigma[female part] of a flower. Pollination leads to fertilization. Fertilization is the fusion of male and female gametes [ here pollen grains and ovaries] resulting in the formation of zygote. Self-pollination occurs when the pollen from the anther is deposited on the stigma of the same flower, or another flower on the same plant.

Cross-pollination is the transfer of pollen from the anther of one flower to the stigma of another flower on a different individual of the same species. Fertilization occurs as a sperm cell in a pollen tube fuses with the egg cell of an ovule, resulting in a plant embryo. Inside the tubes are the sperm cells that will fertilize the egg cells and cause them to develop into seeds. The primary problems with becoming and remaining pregnant in space are radiation and low-gravity environments.