Over 1.5 million
Plants first appeared on Earth around 700 million years ago, during the Paleozoic Era. The earliest plants were most likely simple, non-vascular plants like algae and mosses. Over time, plants evolved to become more complex, eventually giving rise to the diverse plant life we see today.
algae over millions of years. This transition occurred during the Silurian period around 450 million years ago. Early land plants faced challenges such as acquiring water and nutrients, reproducing without water, and developing support structures to stand upright.
The Plantae kingdom, which includes all land plants, is believed to have originated around 470 million years ago during the Ordovician period. This emergence followed the colonization of land by ancestral green algae. Over time, plants evolved into the diverse array of species we see today, contributing significantly to terrestrial ecosystems. The evolutionary history of plants is marked by key developments, such as the transition from non-vascular to vascular systems and the rise of flowering plants.
Both. The generally accepted idea is that life first evolved in the sea. Insects, fish with bony fins and rudimentary lungs (adapted air bladders) and plants eventually left the water to colonize land. Life in both realms continued to adapt to their evironments over millions of years to produce the life that we see today.
i suppose you mean eutriphication... its basically when lots of 'goodies' for plants finds its way into a water system and causes heaps of the water plants to grow.. and the plants that mainly only reproduce when theres heaps of 'food' are the ones that really benfit. Its usually algae though, so the algae takes over and all the other plants can't get any sunlight. so no oxygen is formed (photosynthesis doesn't happen without sunlight) so it causes the waterway to have low oxygen levels and become stagnant..
Plants are unique from animals because plants have a special outer layer over the membrane called a cell wall. also plants have larger vacuoles then animal cells
Scientists have described over 1.7 million of the world's species of animals, plants and algae, as of 2010.
Plants first appeared on Earth around 700 million years ago, during the Paleozoic Era. The earliest plants were most likely simple, non-vascular plants like algae and mosses. Over time, plants evolved to become more complex, eventually giving rise to the diverse plant life we see today.
Plants in the sea evolved about 3,600 million years ago. The first algal scum on land about 1,200 million years ago, The first first land plants appeared around 450 million years ago in the Ordovician period.
There are over 2500 different kinds of plants that live in the swamp. Some of them are ferns and moss.
Through the process of photosynthesis algae and later plants used the energy of sunlight to convert water and carbon dioxide into sugar and oxygen. Oxygen levels rose until they reached a high point of 36% about 300 million years ago. Climate shifts and changes in life on Earth later caused some of that oxygen to go back into carbon dioxide, which was sequestered in carbonate rocks, and oxygen levels began to fluctuate. Currently, oxygen levels are at about 21% but that may change over the next few million years.
The first plants to evolve on Earth were likely simple, non-vascular plants like algae that appeared around 1 billion years ago. These early plants eventually gave rise to more complex vascular plants, like ferns and seed-producing plants, through the process of evolution over millions of years.
Plants, if your Catholic, came from God. When he made the Earth he made plants, water, animals, rocks, and things of that nature. Then he made man, Adam, and woman, Eve. Plants, if your not religious, came from soil that fertilized nutrients in the ground which formed into seeds over time. When it rained the seeds grew larger and larger until they grew into plants and trees and such. And they make their own seeds that fall onto the soil making the pattern continue. Plants, as in house plants, came to be by a farmer, by which we don't know his/her name, by digging a plant out of their soil and watering it and keeping it warm over the non farming season. This turned out quite nicely and now we have such things as house plants.
The first plants appeared on earth over 400 million years ago. One of the earliest plants was cooksonia, which did not have leaves or flowers !
Over 650 species of flowering plants, mosses, lichens, fungi, and algae grow on Mt. McKinley. Only plants that have adapted to the harsh winters and short growing season can survive on Mt. McKinley.
Angiosperm is the plant division that includes flowering plants. Flowering plants started over 200 million years ago.
Nobody actually knows!!! Their are so many species of different plants, over 5 million at least!!!