How many does the eyes close in 1 day,,why do we need to close and open our eyes?why does the flowers die?

Question

How many does the eyes close in 1 day,,why do we need to close and open our eyes?why does the flowers die?

Answer 1

hahahhahaha we close our eyes so as to remove dust particles and it acts as a shield

flowers die as some pigmentinside it dries off due to sun light

Answer 2

The average person blinks 14,400 times per day.  Blinking is used to clear out contaminates and insure the eye remains wet, as well as allowing the eye time to adjust to sudden brightness.

Plants die because of Telomeres and many other reasons.  They lose their flowers when the need for reproduction passes and to conserve resources during the winter.

Plants die because they could be perennials or because of insect activity or lack of nutrients.  All animals eventually die because their genes have a built in limit called the Telomere.  Without this part of the gene it would continue to divide and rebuild cells forever, it would also promote cancer and information lost in the chromosomes.  When the body starts to replace less cells and more cells reach their telomere limit then the body starts to fail.  This is true for all but the simplest organizations including all flowering plants.

The flowers themselves go away because they are expensive on the plant's resources and are only needed for reproduction; the spreading of pollen.  The flower acts as an insect pollinator attractant.  In winter plants shut down and so lose their flowers, many lose their leaves as well, others die down to the root system themselves.

Century plants typically only flower once ever 25 years and then die.  Most plants are flowing plants.  A plant starts to flower when the proper nutrients are there and the temperatures are adequate.  Global Warming has caused premature flowing of some plants and so when a freeze comes the flowers suddenly die and the plant has wasted some of its valuable resources.

After becoming pollinated the plant can develop seeds because it has had the chromosome exchange it needed so flowing early can be a problem with the fruit harvest (fruit is survival package for the seeds).

According to Wikipedia:  http://en.wikipedia.org/wiki/Blink

"Women and men do not differ in their rates of spontaneous blinking, averaging around 10 blinks per minute in a laboratory setting. However, when the eyes are focused on object for an extended period of time, such as when reading, the rate of blinking decreases to about 3-4 times per minute. This is the major reason that eyes dry out and become fatigued when reading."

According to Wikipedia:  http://en.wikipedia.org/wiki/Telomere

"A telomere is a region of repetitive DNA at the end of chromosomes, which protects the end of the chromosome from destruction. Derived from the Greek telos (end) and meres (part).

During cell division, the enzymes that duplicate the chromosome and its DNA can't continue their duplication all the way to the end of the chromosome. If cells divided without telomeres, they would lose the end of their chromosomes, and the necessary information it contains. (In 1972, James Watson named this phenomenon the "end replication problem.") The telomere is a disposable buffer, which is consumed during cell division and is replenished by an enzyme, the telomerase reverse transcriptase.

This mechanism usually limits cells to a fixed number of divisions, and animal studies suggest that this is responsible for aging on the cellular level and affects lifespan. Telomeres protect a cell's chromosomes from fusing with each other or rearranging. These chromosome abnormalities can lead to cancer, so cells are normally destroyed when telomeres are consumed. Most cancer is the result of cells bypassing this destruction. Biologists speculate that this mechanism is a tradeoff between aging and cancer."

According to Wikipedia:  http://en.wikipedia.org/wiki/Flowers

"A flower, also known as a bloom or blossom, is the reproductive structure found in flowering plants (plants of the division Magnoliophyta, also called angiosperms). The biological function of a flower is to mediate the union of male sperm with female ovum in order to produce seeds. The process begins with pollination, is followed by fertilization, leading to the formation and dispersal of the seeds. For the higher plants, seeds are the next generation, and serve as the primary means by which individuals of a species are dispersed across the landscape. The grouping of flowers on a plant are called the inflorescence....

The primary purpose of a flower is reproduction. Flowers are the reproductive organs and mediate the joining of the sperm contained within pollen to the ovules, normally from one plant to another but many plants also can pollinate their own flowers. The fertilized ovules produce seeds that are the next generation. Sexual reproduction produces genetically unique offspring, allowing for adaptation. Flowers have specific designs which encourages the transfer of pollen from one plant to another of the same species. Many plants are dependent upon external factors to move pollen between flowers, including the wind and animals, especially insects. Even large animals such as birds, bats, and pygmy possums can be employed. The period of time during which this process can take place (the flower is fully expanded and functional) is called anthesis....

The transition to flowering is one of the major phase changes that a plant makes during its life cycle. The transition must take place at a time that will ensure maximal reproductive success. To meet these needs a plant is able to interpret important endogenous and environmental cues such as changes in levels of plant hormones and seasonable temperature and photoperiod changes. Many perennial and most biennial plants require vernalization to flower. The molecular interpretation of these signals through genes such as CONSTANS and FLC ensures that flowering occurs at a time that is favorable for fertilization and the formation of seeds. Flower formation is initiated at the ends of stems, and involves a number of different physiological and morphological changes. The first step is the transformation of the vegetative stem primordia into floral primordia. This occurs as biochemical changes take place to change cellular differentiation of leaf, bud and stem tissues into tissue that will grow into the reproductive organs. Growth of the central part of the stem tip stops or flattens out and the sides develop protuberances in a whorled or spiral fashion around the outside of the stem end. These protuberances develop into the sepals, petals, stamens, and carpels. Once this process begins, in most plants, it cannot be reversed and the stems develop flowers, even if the initial start of the flower formation event was dependent of some environmental cue Once the process begins, even if that cue is removed the stem will continue to develop a flower.

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