Which is a defining characteristic that all protobionts had in common?

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#Question id: 4564

#XL - S Microbiology

Who would have proposed that the boundaries between each stratum mark the occurrence of different localized floods?

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#Question id: 20223

#XL - P Chemistry

Which of the following has maximum bond angle ?

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#Question id: 4998

#XL - S Microbiology

Many species of snakes lay eggs, but in the forests of northern Minnesota where growing seasons are short, only live-bearing snake species are present. This trend toward species that perform live birth is an example of

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#Question id: 19756

#XL - P Chemistry

Who was proposed valence-bond theory ?

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#Question id: 18078

#XL - R Botany

Which of the following can be found in gymnosperms?