You have discovered that both you and the person you want to marry have a recessive gene for albinism. You both want a large family. If you marry, there is 25% chance in each pregnancy that the child produced will be an albino. Will you still get married. If yes, will you still try to have a large family? If your first born child is an albino, what problems will he likely face because of his condition? Discuss what you will do as a parent.

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.