Cells transplanted from the neural tube of a frog embryo to the ventral part of another embryo develop into nervous system tissues. This result indicates that the transplanted cells were________.

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#Question id: 17210

#I Life Science/ Life Sciences Group – I-V

which one of the following tools can reliably establish an evolutionary link between two proteins and align them even if they share very low degree of sequence similarity?

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#Question id: 4765

#SCPH12 I Genetics

The recessive mutant allele that causes cystic fibrosis is much more frequent in Caucasians population than in other world populations. Some scientists believe heterozygotes must have had a survival advantage during plagues such as cholera that occasionally swept through this population. What concept does this illustrate?

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#Question id: 5232

#SCPH28 | Zoology

Using molecular clock, it was estimated that two species X and Y must have diverged from their common ancestor about 5 x 10^6 years ago. If the rate of divergence per base pair is estimated to be 0.06 per million years, what is the proportion of base pairs that differ between the two species now?

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#Question id: 953

#SCPH28 | Zoology

 The degradation of arginine, histidine and proline all lead to the product ________.

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#Question id: 11954

#SCPH28 | Zoology

Folic acid supplements have become especially important for pregnant women because ________.