Vascular plants are مزید suited to living on drier land than mosses and liverworts.
They have branching stems with tubelike walls that carry water and nutrients.
These stems and walls also mean the plants can stand tall. Vascular plants have spores (reproductive cells, like seeds)-the taller the plant, the مزید widely it can disperse its spores.
One of the first known vascular plants was Cooksonia. It was about 2 inches tall, with a forked stem.
Paleontologists discovered fossil remains of Cooksonia in England.
Rhynie in Scotland is one site where lots of vascular plant fossils have been found.
The plants at Rhynie would have grown on the sandy edges of pools in the early Devonian period. (400 mya)
One plant fossil found at Rhynie is Aglaophyton, which stood around 18 inches high.
Aglaophyton had underground roots and tissues that supported the plant stem. It also had water-carrying tubes and stomata that allowed air and water to pass through.
Land-living plants were essential for providing conditions for animals to make the transition from the seas to land. They created food, soil, and ground cover for shelter.
They have branching stems with tubelike walls that carry water and nutrients.
These stems and walls also mean the plants can stand tall. Vascular plants have spores (reproductive cells, like seeds)-the taller the plant, the مزید widely it can disperse its spores.
One of the first known vascular plants was Cooksonia. It was about 2 inches tall, with a forked stem.
Paleontologists discovered fossil remains of Cooksonia in England.
Rhynie in Scotland is one site where lots of vascular plant fossils have been found.
The plants at Rhynie would have grown on the sandy edges of pools in the early Devonian period. (400 mya)
One plant fossil found at Rhynie is Aglaophyton, which stood around 18 inches high.
Aglaophyton had underground roots and tissues that supported the plant stem. It also had water-carrying tubes and stomata that allowed air and water to pass through.
Land-living plants were essential for providing conditions for animals to make the transition from the seas to land. They created food, soil, and ground cover for shelter.
Coelophysis was a small, agile dinosaur that lived at the start of the Age of Dinosaurs, about 220 mya.
A huge collection of Coelophysis fossils were found in the 1940s, at a place called Ghost Ranch, New Mexico.
Hundreds of Coelophysis fossils were preserved together at Ghost Ranch---possibly a herd that drowned in a flood.
Coelophysis was almost 10 feet in total length. Its slim, lightweight build meant that it probably weighed 55-60 pounds.
Coelophysis belonged to the group of dinosaurs known as theropods. It most likely ate small animals such as insects, worms, and lizards.
Long, powerful back legs allowed Coelophysis to run fast.
The front limbs were like arms, each with a hand bearing three large, strong, sharp-clawed fingers for grabbing prey.
The birdlike skull was filled with small, sharp teeth.
Coelophysis means "hollow form". It was called that because some of its bones were hollow, like the bones of birds making it lightly built.
A huge collection of Coelophysis fossils were found in the 1940s, at a place called Ghost Ranch, New Mexico.
Hundreds of Coelophysis fossils were preserved together at Ghost Ranch---possibly a herd that drowned in a flood.
Coelophysis was almost 10 feet in total length. Its slim, lightweight build meant that it probably weighed 55-60 pounds.
Coelophysis belonged to the group of dinosaurs known as theropods. It most likely ate small animals such as insects, worms, and lizards.
Long, powerful back legs allowed Coelophysis to run fast.
The front limbs were like arms, each with a hand bearing three large, strong, sharp-clawed fingers for grabbing prey.
The birdlike skull was filled with small, sharp teeth.
Coelophysis means "hollow form". It was called that because some of its bones were hollow, like the bones of birds making it lightly built.
