Which of the following was not a challenge for survival of the first land plants? 

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#Question id: 8892

#XL - R Botany

Which of the following correctly characterizes the phylum Rotifera?

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#Question id: 8894

#XL - T Zoology

Which of the following is a shared characteristic of all chordates?

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#Question id: 8895

#XL - T Zoology

What is one characteristic that separates chordates from all other animals?

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#Question id: 8896

#XL - T Zoology

Chordate pharyngeal slits appear to have functioned first as

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#Question id: 8897

#XL - T Zoology

Which of the following statements would be least acceptable to most zoologists?

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#Question id: 8898

#XL - T Zoology

Which extant chordates are postulated to be most like the earliest chordates in appearance?