Numerical dates based on radioactivity are very important for studying precambrian geologic history because fossils are rare or absent. a. true b. false

it is very important to plant tree because we get oxygen from plants. and we indirectly or directly depend on plants for our survival. Plant gives us raw material like wood, timber which is essential for the settlement. but nowadays the deforestation is increasing day by day which leads to global warming. we should stop deforestation and practice afforestation and reforestation. plants form the natural habitat of many animals, birds and insects. plants help make the land fertile. We get good crops out of fertile land. They are the sources of the fruits and flowers. so we we need to plant trees