What are two basic differences between dna and rna? more than one right a). rna is usually single stranded, while dna is usually double stranded. b). rna contains uracil, while dna contains thymine. c). rna is usually double stranded, while dna is usually single stranded. d). rna contains thymine, while dna contains uracil. e). rna doesn’t contain cytosine, while dna doesn’t contain adenine.

the sun creates it's own light, also gives light and life to bunch of stuff like plants,animals,humans etc.photosyntesis is the process of making food which needs sun,water,nutrients etc.

the oldest known insects are believed to live around 400 millions ago as suggested by the fossil records.   some plants having woody stems also evolved during this time.

after the evolution of insects the first four legged species or the tetrapods evolved in shallow freshwater habitats from the intermediate species approximately 397 million years ago. the tetrapods went on conquering the land giving rise to amphibians, reptiles, mammals and birds.

the major split in tetrapods first occurred 340 million years ago branching off from amphibians.

363 million years ago when the carboniferous period began the insects started roaming on land and taking flights, following which the four limbed tetrapods adapted in the terrestrial habitat.