What is the class of the substitution product of LiAlH4 and an alkyl halide reaction?

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#Question id: 4617

#XL - T Zoology

Which of the following is not an observation or inference on which natural selection is based?

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#Question id: 8709

#XL - T Zoology

Eukaryotes that are not closely related and that do not share many anatomical similarities can still be placed together on the same phylogenetic tree by comparing their ________.

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#Question id: 11607

#XL - R Botany

How the active gibberellin GA1 is inactived by?

a)  By hydroxylation remove GA20 from the biosynthetic pathway by converting it to GA1

b) conversion to GA8 by a hydroxylation on carbon 2

c) By hydroxylation remove GA20 from the biosynthetic pathway by converting it to GA29

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#Question id: 4949

#XL - S Microbiology

What probably accounts for the switch to DNA-based genetic systems during the evolution of life on Earth?

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#Question id: 15609

#XL - S Microbiology

Most bacteria, some protozoans  and even archaea use poly-β-hydroxybutyrate, a polymerized form of β-PHB, as