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#Question id: 4932


Which of the following is the best hypothesis regarding origins of nucleic acids?

#XL - T Zoology
  1. DNA first

  2. RNA first

  3. DNA and RNA formed simultaneously

  4. Protein first


Answer:- Option(s): 2


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#Question id: 6945

#XL - T Zoology

The portion of the Drosophila body plan which will produce the wing is called

TLS Online TPP Program

#Question id: 6946

#XL - T Zoology

The adult body plan of the fly is based on reiterating structures called segments; segment precursors (parasegments) are first positioned at the cell-by-cell level by which group of genes?

TLS Online TPP Program

#Question id: 6947

#XL - T Zoology

What is the correct dorso-ventral arrangement seen in a cross-section of Drosophila embryo?

TLS Online TPP Program

#Question id: 6948

#XL - T Zoology

Which of the following genes is expressed at the posterior margin of each parasegment

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#Question id: 6949

#XL - T Zoology

During gastrulation in Xenopus, the future mesoderm and endoderm move inside the embryo through the "blastopore"; in contrast, in chickens, gastrulation involves cells moving inward through the:

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#Question id: 6950

#XL - T Zoology

In mammalian development, the embryo will form from which population of cells?

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