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TLS Online TPP Program

#Question id: 9181

Turnover of water in temperate lakes during the spring and fall is caused by which of the following?

#SCPH28 | Zoology
  1. warm, less dense water layered at the top
  2. cold, more dense water layered at the bottom
  3. a distinct thermocline between less dense, warm water and cold, dense water
  4. the changes in the density of water as seasonal temperatures change
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TLS Online TPP Program

#Question id: 4580

#SCPH06 I Botany

In modern terminology, diversity is understood to be a result of genetic variation. Sources of variation for evolution include all of the following except
TLS Online TPP Program

#Question id: 934

#SCPH05 I Biotechnology

Nitrogen fixation may occur via all of the following bacteria, except
TLS Online TPP Program

#Question id: 34

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

Which of the following is true of any (S)-enantiomer?
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#Question id: 13199

#SCPH05 I Biotechnology

The non-reducing sugar sucrose is most commonly translocated in the phloem rather than reducing sugar. Why?
a.) because they are less reactive than their reducing counterparts
b.) because sucrose contains more energy than a monosaccharides
c.) because the ketone or aldehyde group is reduced to an alcohol or combined with a similar group on another sugar so as not to be oxidized 
Which one of the following statements is true about translocation of non-reducing sugar?
TLS Online TPP Program

#Question id: 2950

#SCPH28 | Zoology

During which phases of the cell cycle do the chromosomes exist in a doubled state?