1) spreading of perfume in the air is an example of a) diffusion b) osmosis c) active transport d) none of them 2) sunlight energy is trapped by a) thyllakoid b) stroma c) mitochondria d) chloroplast 3) microbiology is the study of a) microorganisms b) insects c) tissues d) fossils 4) reasoning is required after a) observation b) data collection c) hypothesis d) theory

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