Two trains start from A and B respectively and travel towards each other at the speeds of 60 km/h and 45 km/h respectively. By the time they meet, the first train has travelled 30 km more than the second. The distance between A and B is

TLS Online TPP Program

#Question id: 12775

#Unit 10. Ecological Principles

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?

TLS Online TPP Program

#Question id: 12776

#Unit 10. Ecological Principles

Which of the following is an incorrect statement about the regulation of populations?

TLS Online TPP Program

#Question id: 12777

#Unit 10. Ecological Principles

Which of the following is a density-independent factor limiting human population growth? 

TLS Online TPP Program

#Question id: 12778

#Unit 10. Ecological Principles

A population of white-footed mice becomes severely overpopulated in a habitat that has been disturbed by human activity. Sometimes intrinsic factors cause the population to increase in mortality and lower reproduction rates in reaction to the stress of overpopulation. Which of the following is an example of intrinsic population control?

TLS Online TPP Program

#Question id: 12978

#Unit 10. Ecological Principles

Why is territoriality an adaptive behavior for songbirds maintaining populations at or near their carrying capacity? 

TLS Online TPP Program

#Question id: 12979

#Unit 10. Ecological Principles

Consider several human populations  of  equal size  and  net  reproductive rate, but  different in  age  structure. The population that is likely to grow the most during the next 30 years is the one with the greatest fraction of people in which age range?