| The Qur'an frequently summons people to
investigate nature and see the "signs of Allah" therein. All living and
non-living beings in the universe are full of signs revealing that they are
"made", and they are there to demonstrate the power, knowledge and art of their
"maker". Man is responsible of identifying these signs by using his wisdom and
revere Allah. While all living
beings bear these signs, there are some animals which the Quran specially refers to.
The gnat is one of these animals. The 26th. verse of Surat al-Baqara mentioning the gnat
is as below:
"Surely Allah is not ashamed to set
forth any parable -- (that of) a (female) gnat or any thing above that; then as for those
who believe, they know that it is the truth from their Lord, and as for those who
disbelieve, they say: What is it that Allah means by this parable: He causes many to err
by it and many He leads aright by it! but He does not cause to err by it (any) except the
transgressors"
Mostly considered as an ordinary and
insignificant creature, even the gnat is worthy of being examined and pondered on since it
bears the signs of Allah. This is why "Allah is not ashamed to set forth any
parable-(that of) a gnat or any thing above that".
The main food source of
male and female gnats is nectar.
THE EXTRAORDINARY ADVENTURE OF THE
GNAT
What is generally
known about gnats is that they are bloodsuckers and they feed on blood. However, this is
not a very correct information, because not all the gnats but only the females suck
blood. Besides, the females do not suck blood because of their need for food. Both
male and female gnats feed on flower nectar. The only reason why females, unlike males,
suck blood is their need for the proteins found in the blood which help their eggs to
develop. In other words, the female gnat sucks blood just to secure the perpetuation of
its generation.
SPECIAL PINCERS FOR
MATING
A male gnat mature enough to mate uses
its antennas, i.e. its hearing organs, to find its female. The antennas of male gnats have
different functions from those of females. Thin feathers at the end of the antennas are
highly sensitive to sounds produced by female gnats.
Right beside the sexual organ of the male
gnat are found extensions which help him to grab the female while mating in the air. Male
gnats fly in groups seeming like clouds and when a female gnat enters that group, the male
who succeeds to grab the female mates with her during flight. Mating does not take too
long and the male gnat goes back to his group. From that moment on, the female gnat needs
blood for the development of her eggs.
The point to be stressed here is that the
above verse points out to the "female gnats". As we have previously mentioned,
it is only the female gnats who draw near to the humans and who have the superior features
that will be detailed hereafter. Although this importnat detail was unknown at the time
the Quran was revealed, it is surely quite considerable that "female"
gnats are particularly emphasized in the verse.
The development
process is one of the most amazing and admirable qualities of the gnat. The animal
transforms from a tiny larva into a gnat after passing through many different phases. The
story of this development can be shortly summarised as follows;
Gnat eggs, which are fed by blood and get
developed, are laid on damp leaves or dried ponds by the female gnat during summer or
fall. Prior to this, the mother initially examines the ground thoroughly, by using the
delicate receptors under her abdomen. Upon finding a convenient place, she starts to lay
her eggs. Eggs, which are less than 1 mm. in length, are arranged in a row either in
groups or one by one. Some species lay their eggs joined to each other forming a raft,
some of which may contain about 300 eggs.
In some gnat species,
hundreds of eggs are lined up by the female, so as to form a raft.
RESPIRATORY SYSTEM: The respiratory
system of the larva is based on breathing air by means of a hollow tube pulled up over the
water surface. Meanwhile, larvae are hung upside down under the water. A viscous secretion
prevents water from leaking into the openings through which larvae breath.
The carefully placed
white eggs soon start to darken and turn completely black in two hours. This dark colour
provides protection for the larvae by preventing them to be noticed by other insects and
birds.
It takes a winter for the incubation
period to be completed. Since eggs are created with a structure that allows them to
survive through a long cold winter, they stay alive until spring when their incubation
period ends.
GETTING OUT OF THE EGG
When the incubation period is completed,
larvae start to get out of their eggs almost concurrently. The first egg is immediately
followed by the others. After that, all of the larvae start to float in water. The larvae,
which feed continuously, grow in a short while. Soon, their skin becomes too tight so as
not allowing them to grow any further. This indicates that it is time for the first skin
change. The hard and brittle skin easily breaks down. Until the development is completed
as a whole, the gnat larva is to change its skin two more times.
The method used for the feeding of the
larvae is rather impressive. The larvae make small whirlpools in the water with their two
fan-shaped extensions made up of feathers, and thus make bacteria and other
micro-organisms flow towards their mouths. The respiration of the larvae is provided by an
aerial tube similar to the "snorkel" used by divers. They repose upside down in
the water. A viscous secretion secreted by their body prevents water from leaking into the
openings through which they breath. Briefly, the animal lives with the cooperation of many
delicate balances. If it did not have an aerial tube, it could not survive; if it did not
have a viscous secretion, its respiratory tube would be blocked.
In the mean time, most of the larvae
change their skin once more. The last skin change is rather different from the others.
With this last change, larvae pass onto the final stage of their maturation, the
"pupal stage". Now, it is time for the larvae, which are sufficiently grown in
the larval skin, to get rid of this shell.
However, such a different creature gets
out of the shell that it is indeed hard to believe that these two are different
developmental phases of the same being. And this metamorphoses is far too complicated and
delicate to be designed neither by the larva itself, nor by the mother or any other living
thing...
During this latest stage of
metamorphoses, the animal faces the danger of being choked, as its respiratory openings
rising above the water through an aerial tube are to be closed. However, from that stage
on, respiration is not to be done through these holes, but through two tubes newly
emerging on the anterior of the animal. This is why these tubes rise to the water surface
firstly prior to skin change. During the three or four days long pupal stage, no feeding
takes place.
Now, the gnat within the pupa cocoon is
mature enough and has taken its final form. The gnat is ready to fly with all its organs
and organelles like antennas, trunks, feet, chest, wings, abdomen and large eyes.
Gnats at their pupal
stage.
The pupa cocoon is torn at the top. This
stage where a complete gnat emerges is the most fatal stage of all. The greatest risk at
this stage is the leaking of water into the cocoon. However, the torn top is covered with
a viscous liquid preventing the gnats head from contacting water.
The gnat has to get out of its cocoon
without having any direct contact with water. Only its feet touch the water surface. This
moment is extremely important, as even a soft wind may cause its death. The gnat, which
gets out of its cocoon, leaves for its first flight after a rest of about half an hour.
The animal has got out of water without
even touching the water...
At this point, we have to ask: How come
the first gnat had attained the "ability" to go through such a metamorphosis?
Might it be that a larva has "decided" to transform into a gnat after changing
skin three times?
Absolutely not; it is quite evident that
this tiny animal which Allah gives as an example, has specifically been created as it is.
While the gnat gets out of
water, its head should not contact with water at all, because, even one breathless moment
may result with the choking of the gnat. Therefore, even a breeze or a tiny roughness on
the water surface may be fatal for the gnat.
HOW GNATS PERCEIVE THE OUTSIDE WORLD
Gnats are equipped
with extremely sensitive heat receptors. They perceive things around them in different
colours depending on their heat as in the picture on the right. As this perception is not
dependent on light, it is quite easy for the gnat to spot the blood vessels even in a dark
room. The heat receptors of the gnat are sensitive enough to sense heat differences as
small as 1/1000 C degrees.
The gnat has nearly 100 eyes. These eyes
are placed as compound eyes on the top of its head. In the picture above, the
cross-sections of three of these eyes are shown. On the right, it is shown how the image
of an object is transmitted to the brain from the eye.
AMAZING TECHNIQUE OF BLOOD SUCKING
The gnats technique of "blood
sucking" is unbelievably amazing.
After the gnat lands on its target, it
first detects a spot by using the two devices around its mouth. The syringe-like sting of
the gnat is protected with a special sheath, which is stripped off during the blood
sucking process.
The gnat does not prick the skin by
thrusting its sting into it with pressure as assumed. Here, the duty falls to the upper
jaw which is as sharp as a knife, and the mandible on which there are teeth bent
backwards. The mandible is moved forwards and backwards like a saw and the skin is cut
with the help of the upper jaws. When the sting inserted through this cleavage on the skin
reach to the blood vessel, the drilling ends. Now it's the time for the animal to suck
blood.
However, as known, in the slightest harm
made to the vessels, the human body secretes an enzyme that clots the blood and stops its
shedding. This should be a great problem for the gnat, because the body would also react
to the tiny hole opened by the gnat, therefore, the blood would be clotted and reparation
would start. This means that the animal would not be able to suck any blood.
But the problem is specially eliminated
for the gnat. Before the animal starts sucking blood, it leaves a special liquid secreted
in its body into the cleavage opened in the human vessel. This liquid neutralises the
enzyme that provides for the clotting of the blood. Thus, the gnat sucks the blood it
needs without any problem of clotting. The itching and swelling of the spot bitten by the
gnat is caused by this liquid which prevents clotting.
This is surely an
extraordinary process and it brings the following questions to the mind:
1) How does the gnat know that there is
an clotting enzyme in the human body?
2) In order to produce a neutralising
secretion in its own body against that enzyme, it needs to know the chemical of the
enzyme. How can this be possible?
3) Even if it somehow attains such a
knowledge (!), how come can it produce such a secretion in its own body and constitute the
"technical rigging" needed to transfer it to its sting?
The answer is obvious; It is not possible
for the gnat to perform any of those above. It neither has the required wisdom, nor the
chemical knowledge, nor the "laboratory" environment to produce the secretion.
What we talk about is only a gnat of several millimetres without any wisdom or
consciousness, that's all!
It is quite clear that it is Allah,
"Lord of the heavens and of the earth, and of all that is between them", who has
created both the gnat and the man, and donated the gnat with such extraordinary and
marvellous features.
"Whatever is in the heavens and on
earth,- let it declare the Praises and Glory of Allah: for He is the Exalted in Might, the
Wise. To Him belongs the dominion of the heavens and the earth: It is He Who gives Life
and Death; and He has Power over all things." (Surat al-Hadid, 1-2)
When it is considered that apart from the
excellent systems of the gnat such as feeding, reproduction, respiration and blood
circulation, this lice also has complex systems and organic functions, the boundlessness
of the signs of Allah can better be comprehended. |