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TLS Online TPP Program

#Question id: 7297

How is the ABC model for floral identity in Arabidopsis similar to the models for homeotic gene function derived from studies in Drosophila?

#Unit 5. Developmental Biology
  1. The key resposnsibility of homeotic genes in both is patterning of dorsal-ventral asymmetry.
  2. In both organisms, one homeotic gene is expressed at the two ends, a second expressed in to domains more central to that of the first and a third expressed more centrally, thus contributing unambiguous identities to all regions of the organism.
  3. In both organisms, homeotic genes interact, so that it is often the combination of genes present that is critical in specifying structure in adult.

  4. The ABC model of Arabidopsis is essentially identical to the Drosophila model for homeotic gene function, in that the Drosophila version of the A gene is abdominal-A, the Drosophila version of the B gene is Abdominal-B, and the Drosophila version of the C gene is Ultrabithorax.

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TLS Online TPP Program

#Question id: 24165

#General Aptitude

When winding an old clock, it is important not to overwind it. Overwinding occurs when the mainspring is almost fully wound, but the operator continues to turn the winding key. This causes the main spring to coil too tightly, and might even break it.

This paragraph best supports the statement that
TLS Online TPP Program

#Question id: 24166

#General Aptitude

The term spices is a pleasant one, whether it connotes fine French cuisine or a down-home, cinnamon-flavored apple pie. ____________. In the past, individuals traveled the world seeking exotic spices for profit and, in searching, have changed the course of history. Indeed, to gain control of lands harboring new spices, nations have actually gone to war.
TLS Online TPP Program

#Question id: 24167

#General Aptitude

It weighs less than three pounds and is hardly more interesting to look at than an overly ripe cauliflower. ___________________________. It has created poetry and music, planned and executed horrific wars, and devised intricate scientific theories. It thinks and dreams, plots and schemes, and easily holds more information than all the libraries on Earth.
TLS Online TPP Program

#Question id: 24168

#General Aptitude

___________________. It rained in April; it rained in May. It rained in the mornings; it rained in the afternoons. It poured, it drizzled, it showered, it misted—but always it rained. But the good news is we won’t have a drought this summer.
TLS Online TPP Program

#Question id: 24169

#General Aptitude

A fireplace should be lined with special fire bricks to prevent heat transfer.
TLS Online TPP Program

#Question id: 24170

#General Aptitude

Cosmetic plastic surgery is one of the fastest-growing segments of U.S. medicine.