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TLS Online TPP Program

#Question id: 12775

Field observation suggests that populations of a particular species of herbivorous mammal undergo cyclic fluctuations in  density  at  three-  to  five-year  intervals.  Which  of  the  following  represent  (a)  plausible  explanation(s)  of  these cycles?

#Unit 10. Ecological Principles
  1. Periodic crowding affects the endocrine system, resulting in increased aggressiveness. 
  2. Increases in population density lead to increased rates  of predation.
  3. Increases in rates of herbivory lead to changes in the nutritive value of plants used as food. 
  4. All of the above are plausible explanations of population cycling.
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TLS Online TPP Program

#Question id: 12648

#Unit 6. System Physiology – Plant

Biosynthesis of defence compound such as JA occur by the which enzymes_____
TLS Online TPP Program

#Question id: 2933

#Unit 2. Cellular Organization

During G1, prereplication complexes:
TLS Online TPP Program

#Question id: 13189

#Unit 10. Ecological Principles

The relative abundance of C plant species increases with latitude because of the associated temperature gradient. A study in North America found that at  42°  North,  C3  plants  become more  abundant than  C4  plants. Given  an  increase in  mean global  temperatures by  10°C and no  other changes in  environmental conditions,  the latitude at which C3 plants become more abundant:
TLS Online TPP Program

#Question id: 2965

#Unit 2. Cellular Organization

In a diploid cell with 5 chromosome pairs (2n = 10), how many centromeres will be found in a nucleus at G2 of the cell division cycle?
TLS Online TPP Program

#Question id: 10438

#Unit 6. System Physiology – Plant

Which of the following are participate in the control of circadian clocks and flowering?