The first plants to develop a woody core and begin looking like tress were ferns - as early as the Middle Devonian (around 388 million years ago) one species, Wattieza, had already reached heights of 8 m and a tree-like habit. Archaeopteris (an ancestor to gymnosperms like conifers) came a bit later and produced the first true wood.
The first trees we would recognize where the Conifers which appear in the fossil record around the Pennsylvanian (323.2 million years ago to 298.9 million years ago) .
Really, Trees, both leafy and otherwise, reflect sunshine in very particular patterns, making it possible for satellites to map and computers to count strips of land where trees are. Biologists can then sample those places - forests, suburbs, city parks, even city streets - assume a tree density, multiply by acre or hectare, and calculate that. In 2005, there were 400,246,300,201 (more or less) trees on our globe. (That's over 400 billion, for those of you who have trouble working through the commas.) ***EDIT*** - Strange, 400 billion trees only averages out to 60 trees to every 1 human being? Most scientist agree that the data needed to complete the complex mathematics required to accurately approximate the number of trees on the planet Earth simply does not exist. The truth is, we have no idea. Estimates have ranged from anywhere between 1 to 10 trillion trees currently inhabit the surface of the Earth (a considerably noticeable gap can easily be observed between these two figures lol). The number you quoted above (400,246,300,201) was a study funded by an extremely liberal organization which went on to claim (outrageously) that over 50% of the trees on the planet Earth have been harvested/destroyed by human beings. If this were true, the entire human population would have been swept away in an enormous fresh water flood and any remaining survivors would eventually die from starvation, soil degradation/poisoning and/or extreme atmospheric deterioration. I'll let the rest of you decide what you CHOOSE to believe.
About 360 million years. (After the Cambrian period 550 million years ago, or "Cambrian explosion", as it is known, when most animal life began on this planet, plant life began to appear. The first plants, in the ocean, appeared 460 million years ago, and the first trees about 100 million years after that.)
Answer 2 :
Trees must not be confused with plant ! Word trees is reserved for tree ferns , gymnosperms and angiosperms , which appeared in late Paleozoic Era nearly 400 million years ago .
No, black people do not come from another planet. Like all human beings, individuals of African descent originated from the continent of Africa and have evolved and migrated around the world over time.
It is the hottest planet, and it is very rocky with many craters. It is terrestial and the closest to the sun and also the smallest planet.
The earth is the only planet in the solar system that has the ability to hold the different forms of life.This planet also has unique properties like: Air is present in this planet. Plants and trees grow here etc.
No, trees cannot make Jupiter a sustainable planet. Jupiter is a gas giant with extreme temperatures and pressure, making it uninhabitable for life as we know it. Trees require a suitable atmosphere and conditions found on Earth to thrive and cannot survive in the harsh environment of Jupiter.
Trees help the planet survive by absorbing carbon dioxide from the atmosphere and releasing oxygen through the process of photosynthesis. They also provide habitat for various species, help regulate the climate by storing carbon, and prevent soil erosion by stabilizing the soil with their roots. Additionally, trees contribute to the water cycle by absorbing water and releasing it through transpiration.
the answer is no bacause no other planet has trees and trees help you breath
save trees save environment
Trees provide oxygen without trees this would be just a dead planet!
Yes
It suffocates trees and kills them.
No it does not can't support it
Punchin' trees
Trees help to keep our planet alive by converting carbon dioxide into oxygen which is necessary for humans and animals to live.
Saturn does not have trees because it is a gas giant planet with no solid surface for trees to grow on. It mainly consists of gases like hydrogen and helium.
Humans and pine trees both inhabit the planet Earth.
on the planet?- trees, plants, etc. (The Plant Kingdom) on a plant- the leaves!
5000 years