Does the arrangement of monomer units in plastics has any relation for this diversity in plastics ?

Indiscriminate usage of plastic is a serious threat to bio-diversity.

Does the reactivity of a metal and form of its ore(oxides, sulphides, chlorides, carbonates, sulphates) has any relation with process of extraction?

Does your village or nearest city has a recycling unit of waste materials? Write in detail the steps involved in it.

Each plant or group of plants has some phylogenetic significance in relation to evolution. Cycas, one of the few living members of Gymnosperms is called as the 'relic of past'. Can you establish a phylogenetic relationship of Cycas with any other group of plants that justifies the above statement ?

What does this recycling code number mean present on the plastic materials?

Which of the following group does not constitute natural gas ? A. Wooden house, plastic mug, steel spoon B. Forests, rivers, hills, streams