Think of how different our world would be if flowering plants had never evolved. Imagine a spring without those lovely monocots, the flowering bulbs. Or an anniversary sans a dozen dicots; roses. There would be no fruit, no grains, no need for pollinating insects, no perfumes, and few textile sources.
http://bhort.bh.cornell.edu/conservatory/cpage8.html
Around 400 million years ago, in the Silurian Era, the first plants appeared on land. Most similar to what are known today as Bryophytes, they descended from early water dwelling alga. They lacked vascular (circulatory) systems and complex physical characteristics, but their appearance marked a great step in the development of Earth.
http://bhort.bh.cornell.edu/conservatory/cpage8.html
Why do scientists think plants probably evolved from algae? -plants and green algae have the same types of cloraphyll and cartenoids -fossils of early plants are similar to the ancient green algae When plants moved on land what did they have to do and more of what was avaliable? -adapt to new conditions
https://quizlet.com/11471050/science-ch-3-flash-cards/
Gymnosperms are a familiar group nearly everywhere on earth. Ranging from the exotic, ancient looking cycads to the towering Sequoias, they area very diverse and widespread group. Today, we use them for everything from Christmas trees to medicinal Gingko extracts to the special flavoring of gin.
http://bhort.bh.cornell.edu/conservatory/cpage8.html
Within the group, the cycads, or seed ferns, are most likely to have evolved first, and the Gnetophytes, which many consider to be a missing link between gymnosperms and angiosperms, most recently. The evolution of the gymnosperms brought an entirely new concept to plant reproduction: seeds.
http://bhort.bh.cornell.edu/conservatory/cpage8.html
-plants and green algae have the same types of cloraphyll and cartenoids-fossils of early plants are similar to the ancient green algae
https://quizlet.com/11471050/science-ch-3-flash-cards/
Bryophytes are the second largest group of land plants in the world today with over 20,000 species. Like their close relatives, the algae, they require very moist conditions for survival, and their life processes, especially reproduction, rely on water for their very execution. Hornwort photo courtesy U. of Wisconsin. Liverwort (Marchantia sp.)
http://bhort.bh.cornell.edu/conservatory/cpage8.html
With the world's first complete sequencing of a brown algal genome, an international research team has made a big leap towards understanding the evolution of two key prerequisites for higher life on Earth -- multicellularity and photosynthesis.
https://www.sciencedaily.com/releases/2010/06/100603172209.htm
These, along with the cyanobacteria (often misleadingly called blue-green algae), form the phytoplankton of aquatic ecosystems . Others, including all brown algae (Phaeophyta), most red algae (Rhodophyta), and many green algae are multicellular. The large marine forms of these phyla are usually called seaweeds. Plants are thought to have evolved from a class of freshwater green algae called the charophytes. Two particular groups of charophyte, the Coleochaetales and the Charales, resemble the earliest land plants (bryophytes) in a variety of ways, including the structure of their chloroplasts and sperm cells, and the way their cells divide during mitosis .
http://www.biologyreference.com/Ep-Fl/Evolution-of-Plants.html
Such genes are also commonly found in land plants, and we suspect that they also play a key role in the origin of multicellular organisms.. The sequencing of the brown algal genome is also a milestone in the efforts to reconstruct the evolution of photosynthesis.
https://www.sciencedaily.com/releases/2010/06/100603172209.htm
what evolved from ancient green algae
Plants are thought to have evolved from a class of freshwater green algae called the charophytes.