how did life evolve through the course of history of earth

How did life evolve through the course of history of earth? Answer: Life evolve through the course of history of earth through whopping that all life on earth has evolved from common ancestors in an unbroken chain since it origin.

Full Answer

How did life come into being on the Earth?

Some scientists believe that life on Earth may have originated from meteorites from Mars. It is also possible that life may have been carried to Earth in frozen form; research is ongoing. The first living organism, a living cell, developed from non-living matter about 4 billion years ago. But, how did life first begin?

What was the Eon in which life first evolved on Earth?

Archean Eon, also spelled Archaean Eon, the earlier of the two formal divisions of Precambrian time (about 4.6 billion to 541 million years ago) and the period when life first formed on Earth.

How living on Mars would make life better on Earth?

These include:

• The Martian day (or sol) is very close in duration to Earth's. ...
• Mars has a surface area that is 28.4% of Earth's, which is only slightly less than the amount of dry land on Earth (which is 29.2% of Earth's surface). ...
• Mars has an axial tilt of 25.19°, similar to Earth's 23.44°. ...

More items...

How did Earth become suitable for life?

• Warmth? It seems that the temperature on Earth (room temperature, so to speak) is just right for life. ...
• Oxygen? seems to be essential for life
• Water? water is a source of oxygen Protection from Ultra Violet rays Ultra Violet light breaks molecules apart

How long has evolution been around?

All have persisted since roughly 3.7 billion to 3.5 billion years ago during the Archean Eon (4 billion to 2.5 billion years ago), products of the great evolutionary process with its identical molecular biological bases. Because the environment of Earth is so varied, the particular details of any organism’s evolutionary history differ from those ...

When did the first fossils appear?

Not until about two billion years ago are cyanobacterial filaments seen that colonized wet soil. By the dawn of the Phanerozoic Eon, life had insinuated itself between the Sun and Earth, both on land and in the waters of the world.

How many times did the same streamlined shape for high-speed marine motion evolve independently?

The same streamlined shape for high-speed marine motion evolved independently at least four times: in Stenopterygius and other Mesozoic reptiles; in tuna, which are fish; and in dolphins and seals, which are mammals.

What are the microenvironments of the oceans?

All ecosystems contain diverse microenvironments: oxygen-depleted oceanic oozes, sulfide- or ammonia-rich soils, mineral outcrops with a high radioactivity content, or boiling organic-rich springs, for example.

What is Darwin's principle of evolution?

Darwin’s principle of evolution is summarized by the following facts. All life tends to increase: more organisms are conceived, born, hatched, germinated from seed, sprouted from spores, or produced by cell division (or other means) than can possibly survive. Each organism so produced varies, however little, in some measurable way ...

Why did people believe in spontaneous generation?

Many believed in spontaneous generation because it explained such occurrences as maggots swarming on decaying meat.

When did the banded iron formations start?

Most BIFs date from 2.5 billion to 1.8 billion years ago.

How long ago did life begin on Earth?

The timeline of life on earth begins over 4.5 billion years ago. In the beginning, survival was difficult for any life forms. The struggle started and soon after earth’s formation, organisms start appearing. It makes sense the first signs of life on planet earth are incredibly simple.

How long has evolution been on Earth?

Evolution and the timeline of life on earth happened in stages over 4.6 billion years. From cyanobacteria to fungi. Dinosaurs and chickens. Whales and cows. Monkeys to humans, the evolution of life is a story with surprising twists. Earth has been home to over five billion different species of organisms.

How long ago did Dimetrodon live?

This early predator had an appearance much like a dinosaur. However, the last remains of a dimetrodon have been dated to 40 million years before dinosaurs walked the earth. The Dimetrodon was one of the first predators to evolve on planet earth. Source.

What is the dominant species on Earth?

Today humans are the dominant species on the planet. Our footprint means many organisms are becoming extinct. One challenge of humans to fit into the timeline of life on earth see how it would look if we were to vacate the planet and let nature take back control.

What was the first organism to exhale oxygen?

Cyanobacteria, named after their blue/green color- were the first to start exhaling oxygen. Here the early stages of photosynthesis began. For more than a billion years, the timeline of life on earth existed in primal forms. All life was single-celled organisms, made up mainly of bacteria and algae.

What was the first life on land?

New forms of life began to appear. Plants began colonizing the land, and fish began swimming in the seas. The first life on land started as algae gradually adapted to be able to live on dry land.

How many species of life are there on Earth?

Earth has been home to over five billion different species of organisms. Of all of those living life forms, an estimated 99% of all species are now extinct. We, humans, are currently sharing the earth with about 12 million other species.

How long has life been around?

One of the greatest mysteries about life on our planet is when and how it first started. Life appears to have been here for a very long time. Using the tools of science, we have learned that Earth is about 4.5 billion years old. And, as old as Earth is, we’ve found evidence that tells us that living things have been around on Earth for almost as long as our planet has been here. We have evidence that tells us that life may have been on Earth as far back as about 4 billion years ago and maybe even before that.

How old is the Earth?

As old as Earth is, we’ve found evidence that tells us that living things have been around on Earth for almost as long as our planet has been here. We have evidence that tells us that life may have been on Earth as far back as about 4 billion years ago.

Have you ever had a mystery to solve?

Have you ever had a mystery to solve? Like a time when you knew something happened, but you didn’t really know how? Maybe you felt like you needed to find some clues to figure out what happened. That’s how scientists feel about figuring out how life got going here on Earth long ago. If you have a mystery and are curious, you start looking for clues. Scientists are doing that right now. They may not figure it all out before you are a grown up. When you get older maybe you could help find clues to this mystery as well. What kinds of clues do you think would be helpful in learning about things that happened long ago?

A Timeline of the History of Life on Earth

Humans have only been a species in the most recent chapter of the history of Earth. The Earth was formed 4.6 billion years ago, when the sun in our solar system first formed, creating enough gravitational pull to spin planets into orbit.

Timeline of Geological Eras

The geological timeline of Earth is nearly identical to the history of life on Earth, apart from the Hadean Era.

The Archean Era

The Archean Era took place directly after the Hadean Era and is next in the Precambrian. The Archaean Era took place between 4 billion and 2.5 billion years ago. The atmosphere was still highly toxic, and though the Earth was colder than during the Hadean eon, it was still much hotter than the cool Earth of today.

The Proterozoic Era

The Proterozoic era spanned from 2.5 billion to 541 million years ago. During this time, the Earth's atmosphere changed from one that was primarily hydrogen, ammonia, and methane-based to one that was filled with oxygen. This paved the way for the formation of eukaryotic life, which evolved from prokaryotic life approximately 2 billion years ago.

The Paleozoic Era

The Paleozoic era starts 541 million years ago and goes until 252 million years ago. This is the first era in the Phanerozoic Eon, which started 542 million years ago and goes until the present day. This is the era that is the shortest span of time but is one we have a lot of information from due to the diversity of life alive in this time period.

When did the story of Earth begin?

The story of earth begins 4.6 million years ago and takes a journey of difficulty and resilience. Today most of what we know is a scientific guess. In the coming years it’s likely we will see this story change. We can thank our lives today for the process of planet earth. Now it’s up to you.

When did the first organisms come to Earth?

Around 500 million years ago that the first organisms set foot upon the earth’s surface. The massive step in evolutionary terms began the process for plants and trees to develop. The oldest fossilized tree remains date to 385 million years ago. Four-legged animals followed soon after.

What are the elements that make up the atmosphere?

Made of elements like nitrogen, sulfur, hydrochloric acid, some water vapor and carbon monoxide among others. It wasn’t until the planet began to cool off slightly that the atmosphere began to stabilize. Water, previously vaporized, was able to take a liquid form and the result was oceans spanning over the entire planet.

What happened to the Earth when water was vaporized?

As this was happening, intense volcanic eruptions disturbed the earth, and huge clouds covered the skies, meaning rainfall and more cooling.

How long did it take for multicellular life to evolve?

Around 900 million years ago multicellular life evolved. It’s unclear how, but it did, and it took millions of years to happen. After a slow start, the evolution of life on earth began to speed up. The oceans were home to lots of varied forms of life.

What was the planet molten hot?

The planet was molten hot and bombarded with incoming objects from space. In these early episodes of earth’s life was during the time the planet itself was still taking shape. Let’s explore the story of earth.

What is the story of Earth?

The Story of Earth. The story of earth is one of drama and intrigue. For nearly 4.5 billion years the story of earth goes. Through much of its lifespan, the planet looked vastly different than today. In its early life, there was no water, no oxygen, no land, and no life. The earth then formed in violent circumstances.

Why did bodies appear in the first place?

There are several theories for why bodies appeared in the first place in the evolution of life on Earth timeline. One theory in the timeline of life on Earth is that microbes learned to band together to avoid being eaten by bigger microbes. Perhaps they transformed the molecules they used to catch and hold onto prey into molecules ...

What are some examples of early human bodies?

An even more primitive example of an early body is a sponge, which has cells that communicate and function as a whole, division of labor, and also collagen with molecular rivets. This is a very interesting part of the history of life on Earth’s timeline.

What is the name of the single-celled microbe that connects to creatures with bodies and ultimately to humans?

Placozoans and sponges have an even more primitive relative, a single-celled microbe called a choanoflagellate that has features connecting it to creatures with bodies and ultimately to humans in the timeline of life on Earth.