A ladder leaning against a wall is making an angle of 60° with the ground. If the length of the ladder is 18 m, find the distance of the foot of the ladder from the wall.

TLS Online TPP Program

#Question id: 12773

#Unit 10. Ecological Principles

Which of the following graphs illustrates the growth curve of a population of snowshoe hares over several seasons in northern Canada? 

TLS Online TPP Program

#Question id: 12774

#Unit 10. Ecological Principles

Which of the following can contribute to density-dependent regulation of populations?

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?