Reason behind the beauty. . .

Flowers-the most beautiful creation of God . . . But have you ever wondered why they are
bestowed with such beauty..!?! Do you know that plants and flowers have an important role in
the evolution of human beings from the primitive stage. . .!! A flower, sometimes 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
 effect reproduction, usually by providing a mechanism for the union of sperm with eggs.
Flowers may facilitate outcrossing (fusion of sperm and eggs from different individuals in a
population) or allow selfing (fusion of sperm and egg from the same flower). Some flowers
produce diaspores without fertilization (parthenocarpy). Flowers contain sporangia and are
the site where gametophytes develop. Flowers give rise to fruit and seeds. Many flowers have
evolved to be attractive to animals, so as to cause them to be vectors for the transfer of
pollen.
In addition to facilitating the reproduction of flowering plants, flowers have long
admired and used by humans to beautify their environment, and also as objects of romance,
ritual, religion, medicine and as a source of food.


ORGAN DEVELOPMENT:

The molecular control of floral organ identity determination is fairly well understood.
In a simple model, three gene activities interact in a combinatorial manner to determine
the developmental identities of the organ primordia within the floral meristem. These gene
functions are called A, B and C-gene functions. In the first floral whorl only A-genes are
expressed, leading to the formation of sepals. In the second whorl both A- and B-genes are
expressed, leading to the formation of petals. In the third whorl, B and C genes interact to
form stamens and in the center of the flower C-genes alone give rise to carpels. The model is
based upon studies of homeotic mutants in Arabidopsis thaliana and snapdragon, Antirrhinum
majus. For example, when there is a loss of B-gene function, mutant flowers are produced with
sepals in the first whorl as usual, but also in the second whorl instead of the normal petal
formation. In the third whorl the lack of B function but presence of C-function mimics the
fourth whorl, leading to the formation of carpels also in the third whorl. See also The ABC
Model of Flower Development.

 
CLEVER IDEA TO POLLINATE:

Plants cannot move from one location to another, thus many flowers have evolved to attract
animals to transfer pollen between individuals in dispersed populations. Flowers that are
insect-pollinated are called entomophilous; literally "insect-loving" in Greek. They can be
highly modified along with the pollinating insects by co-evolution. Flowers commonly have
glands called nectaries on various parts that attract animals looking for nutritious nectar.
Birds and bees have color vision, enabling them to seek out "colorful" flowers. Some flowers
have patterns, called nectar guides, that show pollinators where to look for nectar; they may
be visible only under ultraviolet light, which is visible to bees and some other insects.
Flowers also attract pollinators by scent and some of those scents are pleasant to our sense
of smell. Not all flower scents are appealing to humans; a number of flowers are pollinated by
insects that are attracted to rotten flesh and have flowers that smell like dead animals,
often called Carrion flowers, including Rafflesia, the titan arum, and the North American
pawpaw (Asimina triloba). Flowers pollinated by night visitors, including bats and moths,
are likely to concentrate on scent to attract pollinators and most such flowers are white.

Still other flowers use mimicry to attract pollinators. Some species of orchids, for example,
produce flowers resembling female bees in color, shape, and scent. Male bees move from one
such flower to another in search of a mate
Most genes central in this model belong to the MADS-box genes and are transcription factors
that regulate the expression of the genes specific for each floral organ.


REASON FOR OUR VISION EVOLUTION:

The evolution of trichromatic color vision in primates occurred as the ancestors of modern
monkeys, apes, and humans switched to diurnal (daytime) activity and began consuming fruits
and leaves from flowering plants.[39] Color vision, with UV discrimination, is also present
in a number of arthropods – the only terrestrial animals besides the vertebrates to possess
this trait and this was made possible by the pollens contained within the flowers.



     SO BEFORE YOU PICK A FLOWER THINK OF IT. . . .