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UCAS-M Spring19 Formal Verbs (Cyanobacteria - Sacks)
First, read the text on your own to understand its content. Next, read again with focus on the verb forms used. Lastly, indicate which verb you think is more formal.
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(1)For one to two billion years, blue-green algae, or cyanobacteria, pumped/infused oxygen into Earth’s atmosphere.(2)The fossil record shows that cyanobacteria kicked off/started three and a half billion years.(3)Yet, some of them still hang around/thrive in odd corners of the world, forming strange, cushion-shaped colonies called stromatolites.(4)It is an extraordinary experience to go to Shark Bay in Western Australia, where stromatolites flourish in the hypersaline waters, to watch them slowly bubbling oxygen, and to think about/reflect that, three billion years ago, this was the how the Earth was transformed.(5)The cyanobacteria invented photosynthesis: by capturing the energy of the sun, they were able to combine carbon dioxide (massively present in the Earth’s early atmosphere) with water to make up/create complex molecules –sugars, carbohydrates – which the bacteria could then store and use for energy as required.(6)This process made/generated free oxygen as a byproduct – a waste product that was to determine the future course of evolution.
(1)For one to two billion years, blue-green algae, or cyanobacteria, ... oxygen into Earth’s atmosphere.
(2)The fossil record shows that cyanobacteria ... three and a half billion years.
(3)Yet, some of them still ... in odd corners of the world, forming strange, cushion-shaped colonies called stromatolites.
(4)It is an extraordinary experience to go to Shark Bay in Western Australia, where stromatolites flourish in the hypersaline waters, to watch them slowly bubbling oxygen, and to ... that, three billion years ago, this was the how the Earth was transformed.
(5)The cyanobacteria invented photosynthesis: by capturing the energy of the sun, they were able combine carbon dioxide (massively present in the Earth’s early atmosphere) with water to ... complex molecules –sugars, carbohydrates – which the bacteria could then store and use for energy as required.
(6)This process ... free oxygen as a byproduct – a waste product that was to determine the future course of evolution.
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