Origins of insects - Unknown things

About three billion years ago, in the shallow waters of the vast ocean, warm waters were warmed by the Sun - life formed! At the dawn of life, there are no human beings on the planet yet, but many species of plants and animals have not yet formed. Life exists primarily in the oceans and in rivers, at which time the so-called " life " can be calculated on the fingertips with only a few low-level organisms such as algae, fungi and yes. even the lichen. According to the timeline, some algae species by sea waves have ' landed ' on the continents and survived. Since then there have been the first terrestrial plants and animals.

The first insect on our planet appeared about 250 million years ago. That estimate has a solid scientific basis.

Many ancestral fossils of various plants and animals have been found, including insects and have been imprinted on soil and rock samples buried in the ground. Today, they have been discovered by paleontologists. Nature has not abhorred but erased what we created.

Right from the dawn of life, the whole world on this earth has two great features: Variations and Genetics. They exist, operate, develop under the strict control of natural selection. Natural selection nourishes and takes care of its 'nursery' with countless species, but eventually only the most adaptive species survive. According to Dacuyn said natural selection 'Every day, every hour is still watching from the very small changes, eliminating the bad, the crude, keeping the good, the work of patience. complaint and not a bit noisy for the perfection of the living body ' Dacuyn's theory of evolution has opened the way for paleontologists to rank hierarchies of extremely chaotic and mysterious fossils in a way self logic and identify kin ancestors of many living and dead creatures on this earth.

Development cycle of butterflies (Photo: philipfong.tripod.com)

So which animal ancestors are the ancestors?

There is one thing in common that all scientists agree on is the ancestor of insects belonging to Arthopoda. But the exact ancestor of any arthropod is still a mystery. There are many ideas that the Tricot is an ancestor of insects because the three-leafed insects and insects have quite similar body composition, they have a pair of beard, a pair of eyes and 3 single eyes. However, this hypothesis did not explain the relationship between primitive winged insects and rolled insects. Some other theories suggest that insects and polyculture have a common ancestor, Protaptera - which is a hypothetical primordial insect with a body consisting of a head, three-breasted chest and 6 abdominal burns; The chest has the same skin folds as the wing and the abdomen also has moving appendages. In the evolutionary process from this species has been divided into two directions:

1. The genital hole in the front part of the body grows into polyploids,

2. Genital holes located in the back of the body develop into insects.

This theory is generally more basic but it cannot reflect the heterosexual rule of arthropod Arthropoda. Obviously this is still a question of academic reasoning. Because all the objects found or found are still random, so the identification of breeds, lines and ancestors is only possible when there is sufficient data about primeval insects and offspring. their grandchildren.

Fossil specimens that retain parts or whole bodies have been allowed to conclude that: Insects are one of the oldest terrestrial inhabitants on earth. In the early days, there were many dragonflies, cockroaches, cicadas, veins and some other species.

The ancient ancestral remains of ancient insects printed discreet images in the abyss of time in previous centuries. The shape of these ' predecessors ' is more or less different from the post-modern birth. However, the main structural features are no different from today's insects. A long period of 250 million years has passed so that the insects still retain almost intact the characteristics of their ancestors. It is also a strange thing in the insect world. Moreover, these almost 'fixed' characteristics make us understand when they are present on this planet.

(Photo: duke.edu)

The body composition of insects is a fairly complete and extremely complex apparatus and is divided into the basic parts: head, chest, abdomen and legs, dual eyes, antennae. Although small in size, insect antennae can be compared to the Antten columns of a large information station today.

After the head of the neck is small and thin, then the larger part of the chest consists of three burners bearing three cow-like legs. Also because of such burning legs, insects are also called Arthopoda arthropods. In addition, the chest and abdomen of the insect also include some of these incinerators. Thanks to such a structure, insect belly can contract, change volume.

The insect body is surrounded by a horn-like crust and is called kittin and almost all insects are analytical animals, they also have sexual organs and appendages. development is quite complete.

Insects also have a nervous system that functions as inferior to other animals . Their nervous system is like a second ladder consisting of two white filaments that thread along the abdomen connected to the nerve nodes, the end is the brain in the head. The brain is similar to the human brain or monkey and other animals. From neurons there are many small white wires branching all over the body called the neural branch. The muscular system is also very complex, distributed throughout the body and performs their body movements. The insect's growth pathway is quite long. Compared to humans, we are only 1 / 15,000 of their development history.

There are about 1 million insect species in the world that have been identified by taxonomists, scientifically named among the remaining insects of more than 100,000 species that we still don't know about. The fact that a species is considered 'new' to science is only 'new' to us because insects have existed on our planet for a long time.

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