What must first form before plants can colonize new land?

name and explain one of the event that occurs during meiosis that increases the variation in offspring even more than simple reproduction?

they had the law tat factories that produces smoke cannot be built near residential buildings.

building of proper sewage system was done to ensure that the waste is carried away from the humans so that they do not get diseases from it.

also they built water systems to provide water in those areas which are drought prone.

answer///triple meter;