TLS Online TPP Program

#Question id: 9251


Which of the following is responsible for the differences in summer and winter temperature stratification of deep temperate zone lakes?

#Unit 9. Diversity of Life Forms
  1. Water is most dense at 4°C.
  2. Oxygen is most abundant in deeper waters.
  3. Winter ice sinks in the summer.
  4. Stratification is caused by a thermocline
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TLS Online TPP Program

#Question id: 10586

#Unit 10. Ecological Principles

Which of the following factors may not change carrying capacity over time?

TLS Online TPP Program

#Question id: 19696

#Unit 13. Methods in Biology

Different leads are used to record ECG of humans. Which of the following connection shows in recording limb lead I?

TLS Online TPP Program

#Question id: 4902

#Unit 8. Inheritance Biology

Leber hereditary optic neuropathy (LHON) is mitochondrial diseases present in family. Which of the following observation is correct?

TLS Online TPP Program

#Question id: 13219

#Unit 6. System Physiology – Plant

In the apoplast pathway, water moves exclusively

TLS Online TPP Program

#Question id: 13131

#Unit 10. Ecological Principles

Biologists performed an experiment with flies to examine the effects of population size on the maintenance of genetic variation  and  on  egg-to-adult survival.  From  a  large  source  population, they  randomly  assigned  eggs  to  three experimental  populations  of  size  N,  equal  to  20,  60,  and0100.  For  later  generations,  they  collected  N  eggs  from each  population  and  moved  them  into  identical  vials  that  co0ntained  f2re0sh  me4d0ium.  Th6e0y  coun8te0d  the  number  of adult flies that emerged and used tissue samples from the adults for genetic analyses. Genetic variation was measured by  scoring  alleles  at  several  polymorphic  loci  and  expressed  as  the  average  number  of  alleles  at  those  loci.  The results are summarized in Figure 1 and Figure 2 below.


The numbers of adult flies that emerged from the three populations in the first generation are closest to which of the following?