When did herbivorous arthropods begin to land during the evolution of life on Earth?

There is less and less food in the ocean, and it is no longer enough time to survive.

It started when it was difficult to get food in the ocean.

It was in the ocean that there was not enough food to get and the landing began.

When the climate began to warm, they began to land.

When the oceans start to get polluted.

When the oceans start to be unable to provide them with food.

When they start to be unsatisfied.

When there are not enough resources in the ocean to feed them.

The food in the ocean is no longer enough to meet their survival needs.

When the plants in the ocean are not satisfied.

Summary. The law of plant evolution in the process of earth's evolution: the sequence of plant evolution: algae - mosses - ferns - gymnosperms - angiosperms.

The law of plant evolution in the process of earth's evolution: the sequence of plant evolution: algae - mosses - ferns - gymnosperms - angiosperms.

1. The evolution of invertebrates. The earliest animals on Earth were single-celled protozoa. Multicellular animals evolved from primitive single-celled animals.

It is generally believed that multicellular animals originated from the flagellates that began with prototremor, and many species of solanum macrospikes show a tendency to develop into a multicellular state, such as algae and hollow coccus.

2. The evolution of vertebral kinetic infiltration. The evolution of vertebrates can be divided into three stages: the evolution in the water, the evolution from the water to the land, the evolution of amphibians and reptiles, and the evolution of birds and mammals.

1. The origin and evolution of fishes. The primitive head class can be divided into two branches. A more primitive, mandibless, such as the Armoured Fish that appeared in the Ordovician of the Paleozoic Hall, flourished in the Sowan Silurian and Devonian periods, and their bodies were covered with bulky bone armor, which was quickly eliminated because they could not adapt well.

Only a few of them, such as the seven-cheek eel and hagfish, survive, and because they have no upper and lower jaws, they have to live a semi-parasitic life. The other branch produced the upper and lower jaws, which were able to live actively, becoming the ancestors of fishes.

2. The origin and evolution of amphibians and reptiles. Switching from aquatic life to terrestrial life, because the ancient total-finned fish had internal nostrils, and the structure of the even-fin was similar to the five-toed limbs, and after the collapse of the hail track, due to the change of the environment, it gradually became a primitive amphibian. The earthworm newt is the ancestor of the modern anchodae, and the amphibians, another branch of shell vertebrae, evolved into the modern tailed and anopod.

3. The origin and evolution of birds and mammals.

The evolutionary law of living things: from simple to complex, from low to high, from aquatic to terrestrial.

What are the erosion landforms and accumulation landforms.

Ravines, valleys, waterfalls, and water falls are typical erosion landforms, while terraces, impact plains, and deltas can be considered accumulation landforms.

Summary. Extended information: The direct causes of biological evolution: the carrier of the existence of living organisms is the earth, and the earth's environment is constantly changing; The root cause of biological evolution: the organism undergoes genetic mutation, and the environment selects the species to select the genes that adapt to the environment.

Biological evolution refers to the evolutionary process of the occurrence and development of all life forms. The word evolution is derived from the Latin word evolution, and its original meaning is generally used to refer to the gradual change and development of things, the transition from one state to another. In 1762, the Swiss scholar Bonnet was the first to apply the term to biology.

Later, Darwin's theory of the origin of species was also born on the basis of this theory.

The reasons for the emergence and evolution of life on Earth do not include?

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Kiss is happy to solve the problem for you: the reasons for the emergence and evolution of life on Earth do not include: 1: The average temperature is about 15 degrees Celsius 2: There are flares and beautiful aurora 3: The presence of liquid water.

Extended information: The direct causes of biological evolution: the carrier of the existence of living organisms is the earth, and the earth's environment is constantly changing; The Root Causes of Biological Evolution:

When an organism undergoes a genetic mutation, the environment selects the species to select genes that adapt to the environment. Biological evolution refers to the evolutionary process of the occurrence and development of all life forms. The word evolution is derived from the Latin word evolution, and its original meaning is generally used to refer to the gradual change and development of things, the transition from one state to another.

In 1762, the Swiss scholar Bonnet was the first to apply the term to biology. Later, Darwin's theory of the origin of species was also born on the basis of this theory.

Animals evolved from plants. The location of the nearest common ancestors of plants and animals is currently uncertain, but it can be inferred from the available evidence that the way in which they separated may be traced back to the common ancestor of the entire eukaryotes, whose origin was the formation of chloroplasts after eukaryotes ingest cyanobacteria. One of the cells that was not engulfed evolved into an animal, and a cell with chloroplasts evolved into a plant.

In the first period of life formation, there were no plants and animals, and only some primitive life forms existed. They belong neither to plants nor to animals. These life forms were formed from organic matter on the primitive earth.

Primitive lifeforms gradually evolved into primitive single-celled organisms, and primitive single-celled organisms gradually evolved into primitive algae plants.

It shouldn't be, nature is still quite magical, but it doesn't mean that animals and plants are the same ancestor.

Summary. The tissues of our plant bodies gradually became more complex, and we entered the age of ferns, the gastrulation cavity, that is, the digestive circulatory cavity, forming a dense forest, and their mouths occurred at the opposite end of the original mouth, or the angiosperm age, molluscs, until now, so arthropods are believed to have evolved from ancient annelids.

There are about 5 million to 100 million species of organisms on the earth, and these creatures evolved gradually.

The tissues of our plant bodies gradually became more complex, and they entered the age of ferns, and the gastrulation cavity was the digestive circulation cavity, forming a dense forest, and their mouths occurred at the opposite end of the original mouth, or the age of angiosperms, molluscs, until now, the arthropod of Inchsa is believed to have evolved from the ancient annelids.

For the evolution of plants and animals.

This still forms a complete scientific system.

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Answer B test question analysis: The earliest vertebrates that appeared on the earth were ancient fish, and gradually evolved into primitive amphibians, ancient amphibians evolved into reptiles, and some reptiles in ancient times evolved into primitive birds and mammals, so the general process of vertebrate evolution is: primitive fish primitive amphibians primitive reptiles primitive birds and mammals, in which the reproductive development of fish and amphibians are inseparable from water, and the reproductive development of reptiles is completely free from the limitations of water, which is the earliest, True terrestrial vertebrates.

Test Center: This question examines the evolution of vertebrates. Comments:

This question is a basic knowledge question, and the key to solving the problem is to be familiar with the fact that reptiles are completely free from the limitations of water and are the earliest and true terrestrial vertebrates.

How did the earliest life in the universe come to be? On the topic of whether the earth is a living body, my personal opinion is that the universe only has the most primitive life, and there is no first life, and the earth is not a living body. Why?

Because cosmic matter is a natural celestial body that objectively exists, has infinite circulation, and has no beginning and no end, life is the form of existence of cosmic active matter, which can realize the transformation of inorganic matter into organic matter, and can realize the accumulation and regeneration of stellar energy matter. The matter that exists in the universe is the inorganic dust particle flow material released by countless stars, which can be collectively referred to: natural fixed matter.

The ingredients mainly contain four basic elements: carbon dioxide, nitrogen, water (hydrogen and oxygen) and toxic chemicals, which are also the basic elements that make up active living matter.

Therefore, the natural fixed matter is the seed substance that formed the primitive life. In nature, there is a natural formation of stable liquid water bodies (oceans), and there will be natural phenomena such as the continuous birth and evolution of active life substances. The most primitive life form in the universe is single-celled microorganisms, and the formation of all biological species is the continuous evolution of the most primitive single-celled microorganisms.

The birth of a single cell is the chemical synthesis of a series of chemical reactions between the flowing liquid water body under the continuous light and heat energy transmission of the sun (star), which will cause a qualitative change in the natural fixed substance, and form an active primitive single-cell life substance from the inorganic dust particle flow substance, thus shaping the birth and formation of the most primitive life single cell in the universe.

In addition, the earth is the manifestation of a huge planet formed by the gradual accumulation and accumulation of mass of dust particles released by the solar nuclear fusion combustion process. Therefore, the earth is not a living organism in the true sense of life.

As we all know, life originated in the ocean, so before the appearance of animals there were bacteria, protists, and fungal organisms and plants, and then animals appeared, and the first animals were microscopic zooplankton in the ocean.

With a history of 4.6 billion years, the evolution of life on the surface of the earth has gone through a long process, before the Cambrian period, the first algae organisms appeared, producing oxygen for the earth, the Cambrian period began to be the era of invertebrate development, and invertebrates in the ocean flourished unprecedentedly, such as trilobites, nautilus, etc.

Apes were the first to appear on the earth, and we humans also evolved from apes, so it can be said that apes are our ancestors.

Wisdom is the clear direction of the evolution of life on earth, and what is the ultimate goal of biological evolution?

Human beings do not answer by hand by the earth creatures Zen Shen evolution He Shu respected?