A researcher is trying to construct a molecular-based phylogeny of the entire animal kingdom. Assuming that none of the following genes is absolutely conserved, which of the following would be the best choice on which to base the phylogeny?

TLS Online TPP Program

#Question id: 5079

#XL - T Zoology

The pattern of embryonic development in which only the cells lacking yolk subsequently undergo cleavage is called:

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#Question id: 5080

#XL - T Zoology

As cleavage continues during frog development, the size of the blastomeres:

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#Question id: 5081

#XL - T Zoology

 The vegetal pole of a frog zygote differs from the animal pole in that ________.

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#Question id: 5082

#XL - T Zoology

 In which of the following organisms does holoblastic cleavage typically occur?

I) sea urchins

II) humans

III) birds

IV) fish

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#Question id: 5083

#XL - T Zoology

Which of the following correctly displays the sequence of developmental milestones?

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#Question id: 5084

#XL - T Zoology

The first cavity formed during frog development is the ________.