can any one please make a summary of this-
Evidence from fossils suggests that early ancestors of birds took to the skies using the ability that were provided to them by the development of feathers, and, the modification of the two front-limbs into wings. This was during an era when the contitinents of the Earth formed one land mass called Pangaea, dateing back approximately 200 milion years ago. However, Pangaea spilit into two separate land massess, Laurasia (in the northern hemisphere) and Gondwana (in the southern hemisphere). The formation of multiple continents from Gondwana resulted in the distribution of the ancestors of flight birds, which initially inhabited various regions of Pangaea, to flourish in isolated regions of modern day Africa, South america, and Australia. An surprising fact is that even though fossils of the ancestors of the ratites were found in Laurasia —in the northern hemisphere-— modern ratites mainly occupy regions in the southern hemisphere.
Answers
Evidence from fossils suggests that early ancestors of birds took to the skies using the ability that were provided to them by the development of feathers, and, the modification of the two front-limbs into wings. This was during an era when the contitinents of the Earth formed one land mass called Pangaea, dateing back approximately 200 milion years ago. However, Pangaea spilit into two separate land massess, Laurasia (in the northern hemisphere) and Gondwana (in the southern hemisphere). The formation of multiple continents from Gondwana resulted in the distribution of the ancestors of flight birds, which initially inhabited various regions of Pangaea, to flourish in isolated regions of modern day Africa, South america, and Australia. An surprising fact is that even though fossils of the ancestors of the ratites were found in Laurasia —in the northern hemisphere-— modern ratites mainly occupy regions in the southern hemisphere.
Answer:
Evidence from fossils suggests that early ancestors of birds took to the skies using the ability that were provided to them by the development of feathers, and, the modification of the two front-limbs into wings. This was during an era when the contitinents of the Earth formed one land mass called Pangaea, dateing back approximately 200 milion years ago. However, Pangaea spilit into two separate land massess, Laurasia (in the northern hemisphere) and Gondwana (in the southern hemisphere). The formation of multiple continents from Gondwana resulted in the distribution of the ancestors of flight birds, which initially inhabited various regions of Pangaea, to flourish in isolated regions of modern day Africa, South america, and Australia. An surprising fact is that even though fossils of the ancestors of the ratites were found in Laurasia —in the northern hemisphere-— modern ratites mainly occupy regions in the southern hemisphere.