Why are there trees in the world and what is the tree of the world?

Evolutionarily speaking, the first plants were unicellular algae.

Later, land and sea changed, and land appeared on the earth, and early mosses and ferns appeared.

After the end of the Ice Age, it was a period of development and prosperity for life on Earth. During this period, the climate is warm and humid, which is suitable for plant growth and evolution. Due to the moist conditions, the leaves of the plant gradually widen and are filled with water.

Among the plants, some plants are taller and larger, while others are shorter. Dwarf plants cannot receive enough sunlight to photosynthesize and are eliminated, while the next generation of taller plants is divided into tall and short, and the short ones are always unable to continue to survive, so the years accumulate, and the tall type of plants appears - Darwin's theory of natural selection.

Later, after the next Ice Age, it was natural selection, and the plants with thicker and harder bark survived, and after natural selection, eventually evolved into the trees that LZ doubts today.

Because there was no oxygen in the early Earth's atmosphere, there were trees.

Now oxygen is consumed by the vast number of living beings, and for the sake of the balance of the world, God said, there must still be trees. In order to build a house and lay the floor, we say, have trees. It's hot, we say, have trees.

It should be that at the beginning of the world, there were single cells, cells from low to high.

Trees, on the other hand, are low-level creatures.

Formed a tree, in fact, it was a creature, and I call it a tree.

Because there are seeds, there are trees.

That's why nature is magical! Consumers are created, producers are created, and the balance of the ecosystem is maintained.

。Why are there people in the world?

So why should there be you in the world? I'm more curious...

A tree in Norse mythology.

The World Tree refers to the tree in Norse mythology, in which the branches of this giant tree make up the entire world. Its transliteration is "Ektrasill" (Gonos: askr yggdrasills, English: yggdrasill).

Introduction

The first root goes deep into Asgard, and beneath the root is the Well of Urd, where the gods meet every day for discussion. In addition, there are the three goddesses of Noren, that is, the goddesses who are in charge of fate.

The second root goes deep into the abode of the giants of Jothuheim, and under its roots lies the Fountain of Mimir, a fountain of wisdom and knowledge.

The third root runs deep into the land of fog in Niflheim, where the spring Hvergelmir and Nidhogg, a poisonous dragon that eats at the roots. It kept biting at the roots until one day when it could finally bite the tree, and the ragnarok of the gods would come.

The World Tree (Yggdrasil), also known as the "World Tree", is a giant tree in Norse mythology. In Norse mythology, the branches of the giant tree of this tree make up the entire world. The spear of the Norse god Odin, Gungnir, was made from the branches of this tree.

The World Tree is from Northern Europe and is also a very tall tree, about ten meters tall.

It's a kind of tree on the Nordic side...

There are many kinds of trees in the world, including eucalyptus, tomentosa, poplar, jujube, locust tree, willow, metasequoia, magnolia, sycamore, camphor tree, ginkgo, maple, peach, apple tree, rubber tree, birch, poplar pear tree, orange tree, coconut tree, loquat tree.

Iron tree, palm tree, coral tree, ginkgo, oak, almond, superba, holly, plane tree, privet, large-leaved yellow tree, larch, black acacia, masson pine, Simao pine, Yunnan pine, South Asian pine, Pinus tabuliformis, Korean pine, black walnut, lemon, plane tree, peach, dove tree, kapok, Javan kapok, bauhinia, sheep's foot beetle, rain tree, acacia, dragon's tooth flower, thorn tree, magnolia, cycad, crape myrtle, etc.

Morphological characteristics. A growth ring is a layer produced by the growth of a tree in a year, which appears in a cross-section like a (or several) rings, surrounding the same rings that were produced in the past. Scale growth rings in fish refer to the dividing line between the narrow band formed in the autumn and winter of the current year and the wide band formed in the spring and summer of the following year.

The secondary xylem produced by the growth ring vascular cambium during a growth phase constitutes a growth ring. There is a clear seasonality, and only one growth ring is produced in a year, which is the age of the tree, also known as the tree's growth rings.

Summary. Ginkgo biloba is a rare tree species relict in the Mesozoic Era, which is a specialty of China, born at an altitude of 500-1000 meters, sour xing (pH value yellow soil, well-drained natural forests, often mixed with coniferous and broad-leaved tree species such as cedar, quince, blue fruit tree, etc., and grows vigorously. It is cultivated in gardens from Korea, Japan, Europe and the United States.

Ginkgo biloba is a fast-growing precious timber tree species, sapwood light yellow, heartwood light yellow-brown, fine structure, light and soft quality, rich elastic xing, easy to process, shiny, specific gravity, not easy to crack, not inflexible, for excellent wood, for construction, furniture, interior decoration, carving, drawing plates, etc. The seeds are used for edible and medicinal purposes. The leaves can be used as medicinal and insecticides, and can also be used as fertilizer.

The fleshy outer seed coat of the seeds contains leukocaric acid, leukogol and ginkgol, and has du. The bark contains tannins. The ginkgo tree has a beautiful shape, with green leaves in spring and summer, and yellow in autumn, which is quite beautiful, and can be used as a garden tree and street tree.

Hello dear, I am happy to answer for you: What trees are there in the world? The reply is as follows:

There are ginkgo trees in the world. The ginkgo tree has a history of 100 million years since its birth, so it is called a "living fossil". The leaves of these trees are regular fan-shaped, turquoise in spring and summer, and in autumn they turn golden and pure, with no other colors.

Ginkgo biloba is a rare tree species relict in the Mesozoic Era, which is a specialty of China, born at an altitude of 500-1000 meters, in the natural forest of the yellow soil with pH value and good drainage, and is often mixed with coniferous and broad-leaved tree species such as cedar, quince tree, blue fruit tree, etc., and grows vigorously. It is cultivated in gardens from Korea, Japan, Europe and the United States. Ginkgo biloba is a fast-growing precious timber tree species, sapwood light yellow, heartwood light yellowish brown, fine structure, light and soft quality, rich elastic xing, easy to process, shiny, specific gravity, not easy to crack, no flexural, Qingsun dismantled for excellent wood, for construction, furniture, interior decoration jujube, carving, drawing plates, etc.

The seeds are used for edible and medicinal purposes. The leaves can be used as medicinal and insecticides, and can also be used as fertilizer. The fleshy outer seed coat of the seeds contains leukocaric acid, leukogol and ginkgol, and has du.

The bark contains tannins. The ginkgo tree has a beautiful shape, with green leaves in spring and summer, and yellow in autumn, which is quite beautiful, and can be used as a garden tree and street tree.

Dear, long waiting! There are many kinds of trees in the world, including Du Ying, T. tomentosa, Populus spp., Jujube, Locust tree, Willow tree, Metasequoia, Magnolia, Sycamore, Camphor tree, Ginkgo biloba, Maple, Peach, Apple tree, Rubber tree, Birch, Populus euphratica, pear tree, orange tree, coconut tree, loquat tree, iron tree, palm tree, coral tree, ginkgo, oak, almond, superba, holly, plane tree, privet, large-leaved yellow tree, larch, black acacia and so on. A general name for a tree, a woody plant, which is mainly composed of roots, stems, branches, leaves, flowers, and fruits.

With the development of computers, in the data structure, a tree is extended to be composed of a set and a relationship defined on that set, consisting of a root node and several subtrees. Trees are perennial plants with woody trunks and branches. Generally speaking, the tree is called a tree, and the main trunk plant is one, and the branches are higher from the ground, which can form a crown.

There are many species of trees.