Darwin analogized the effects of evolution as the above-ground portion of a many-branched tree, with extant species being the tips of the twigs. The common ancestor of two species is most analogous to which anatomical tree part?

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#Question id: 5543

#XL - T Zoology

What is the purpose of the chorion in terrestrial vertebrate embryos?

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#Question id: 19675

#XL - P Chemistry

What is the correct name for a molecule that has two amino groups in opposing (para) locations around a benzene ring?

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#Question id: 3932

#XL - Q Biochemistry

Which is not a feature of eukaryotic mRNA processing?

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#Question id: 27206

#XL - T Zoology

Which of the following statements is/are true about nucleic acid?

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#Question id: 430

#XL - R Botany

The reactions that digest foods in the mouth, stomach and intestine are classified as reactions.