What is the function of pollen?
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It's an oversimplification to say that pollen is a plant's sperm:\n\nPollen grains are structures that house the male gametophyte generation of angiosperms and gymnosperms (seed plants).  They are also the vehicles in which the male gamete genetic code is carried to the female gamete.  Pollen grains develop in the anther in angiosperms.  It travels and is deposited on the stigma of a receptive flower.  In gymnosperms, pollen develops in the male cone, travels, and fertilizes the ovules in the female cones to produce seeds.  Each pollen grain consists of the two celled male haploid plant enclosed in a thickened wall.
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vacuoles tend to be very large and are extremely important in providing structural support, as well as serving functions such as storage, waste disposal, protection, and growth. Many plant cells have a large, single central vacuole that typically takes up most of the room in the cell (80 percent or more). Vacuoles in animal cells, however, tend to be much smaller, and are more commonly used to temporarily store materials or to transport substances.\n\nBecause the central vacuole is highly selective in transporting materials through its membrane, the chemical palette of the vacuole solution (termed the cell sap) differs markedly from that of the surrounding cytoplasm. For instance, some vacuoles contain pigments that give certain flowers their characteristic colors. The central vacuole also contains plant wastes that taste bitter to insects and animals, while developing seed cells use the central vacuole as a repository for protein storage.\n\nAmong its roles in plant cell function, the central vacuole stores salts, minerals, nutrients, proteins, pigments, helps in plant growth, and plays an important structural role for the plant. Under optimal conditions, the vacuoles are filled with water to the point that they exert a significant pressure against the cell wall. This helps maintain the structural integrity of the plant, along with the support from the cell wall, and enables the plant cell to grow much larger without having to synthesize new cytoplasm. In most cases, the plant cytoplasm is confined to a thin layer positioned between the plasma membrane and the tonoplast, yielding a large ratio of membrane surface to cytoplasm.\n\nThere are more important functions of central vacuole but i guess the functions above are enough for you to understand its role.\n\n:)
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You need to get the sperm to the eggs and with an "army " of sperm, its more likely that some of it will eventually make it past all of the factors that might cause it from not reaching its target... such as when pollen is on a pollinator, some of it is usually lost in flight or just in the regualr movement of the animal that does that job. some plants are pollinated by the wind and the more that is released increases the  chance that some of it will reach the egg. Eggs are usually very close to the adult version of the plant or even within the plant before they are fertalized so they are mainly stationary... with more chances to reach the egg it increases the fecundity.
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Different flowers ahve diffent scent genes.In order to attract insect for entomophily(Insect assisted pollination), a flower needs specific kind of insect whose mouth parts are well suited for pollen grains to fall on stigma.
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FLowers are the sex organs of the plant.  They are pollinated and make seeds.
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roots anchor plants and uptake water an minerals\nleaves transpiration, resperation and photosynthesis\nstems have a few functions, nutrient transport some are modified for reproduction ie: stolons or rhizomes in trees and woody plants support
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pollen and small insects, including other kinds of fireflies
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POLLEN TUBE\nA tube that grows from a pollen grain on the stigma of a flower down through the style into the ovary.\n\nS: (n) pollen tube ((botany) a slender tubular outgrowth from a pollen grain when deposited on the stigma for a flower; it penetrates the style and conveys the male gametes to the ovule)
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The answer is C because seed- bearing plants, or spermopsidae, adapted to not need H2O for reproduction. The gametophyte generation in seed plants is the pollen and seeds. Other plants, such as ferns DO have a primative form of a vascular system, therefore C is the only answer...
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The skin deveolpes from the mesocarp of the fruit.  Not all biological features have a necssary function but I think in this case it will help keep the nut from drying out.
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If it is the same species of flower, the pollen lands on the stigma (easy to remember...stigma ma mother ei female / stamen....men....male) a chemical reaction occurs that makes the pollen develop a tube/ straw that leads down the stigma to where the seeds are...get a text book out for this cant remember the name of that thing....the DNA is then taken up by the flower in the production of the seed....Oooo dear so many years ago.....cant remember a thing properly
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The main function of carbohydrates is to provide energy, but they also play an important role in: \nThe construction of the body organs and nerve cells \nThe definition of a person's biological identity such as their blood group \nEnergy source and storage \n Gut function and dietary fibre
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Proteins' main fuctions are to serve as biological catalysts in living things. That means that they allow biological processes to occur faster and more efficeintly. Also proteins are used to regulate biological functions. They serve other functions also such as chemical messengers, building blocks, and transporters. Because DNA, the code of life, encode ultimately for proteins, the proteins are central to almost every biological process from respiration to reproduction. The easier question to ask is what proteins don't do.
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It is almost always for attracting pollenators, but it can have a few more uses to a plant. It can even imitate the shape and colour of a pollenator insect (and attract others of the same insect). Or the colour may be very showy to pollenators - insects or birds. Birds see flowers in the same colours as we do (more or less). But insects are said to have all their colours shifted in such a way that white and yellow flowers are most attractive to them. This partly explains why there are so many white and yellow flowers. Insects use part of the infrared spectrum to see, and that part is mostly invisible to us (non-insects). So they are seeing different colours than we do.\nAlso, some flowers use their petals to guide pollenators to a convenient position to put the pollen on their head. The pollenators are usually just visiting to get a meal of nectar (juice provided by the plant). Hummingbirds go to Hibiscus plants to get nectar, and the petals help direct them to put their bills in the right place (while the other flower parts drop pollen on the birds' heads, and try to get any pollen from other plants of the same species that the bird visited). And the orchid genus Habenaria uses its complicated orchid petals to drop big balls of pollen on mosquitoes' heads
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They convert inorganic material to organic ones to make the soil fartile. This is done due to their living and it also helps in living the plants... both way benefecial :)
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The tonsils function as the first outpost of the body's immune defense system at the portal of easiest entry for germs into the body - the mouth.   You can read more about tonsils at the following links:
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The most important feature distinguishing the cells of plants from those of animals is the cell wall. In plants this wall protects the cellular contents and limits cell size. It also has important structural and physiological roles in the life of the plant, being involved in transport, absorption, and secretion.