#Question id: 7767
#Unit 5. Developmental Biology
How can evolution select for phenotypes that postpone reproduction or sexual maturity?” There is often a trade-off between reproduction and maintenance, and in many species reproduction and senescence are closely linked. Recent studies of mice, Caenorhabditis elegans, and Drosophila suggest that there is a conserved genetic pathway that regulates aging and that it can indeed be selected for. This pathway involves the response to insulin and insulin-like growth factors, Name of these transcription factors are
#Question id: 7768
#Unit 5. Developmental Biology
The insulin signaling pathway inhibits the synthesis of the Foxo transcription factor proteins that would otherwise increase cellular longevity. Downregulation of the insulin signaling pathway has several other functions, choose right one
#Question id: 8287
#Unit 9. Diversity of Life Forms
The following phylogeny shows six living
species (a-f) and five ancestral (now extinct) species (#1-5). If the phylogeny
had been developed on the basis of similarities in bone structure, which of the
following predictions would you make in terms of the structure of a particular
enzyme?
#Question id: 8288
#Unit 9. Diversity of Life Forms
Some beetles and flies have antler-like structures on their heads, much like male deer. The existence of antlers in beetle, fly, and deer species with strong male-male competition is an example of ________.
#Question id: 8289
#Unit 9. Diversity of Life Forms
The term convergent evolution is most applicable to which of the following features?
#Question id: 8290
#Unit 9. Diversity of Life Forms
If, someday, an archaean cell is discovered whose rRNA sequence is more similar to that of humans than the sequence of mouse rRNA is to that of humans, the best explanation for this apparent discrepancy would be ________.