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TLS Online TPP Program

#Question id: 12340

Keystone species are thought to have profound effects on the structure and composition of ecological communities because they

#Unit 10. Ecological Principles
  1. Tend to reduce diversity by eliminating food resources for other species
  2. Provide the foundation for food webs
  3. Are more abundant than most other species in their communities
  4. Can prevent superior competitors from driving inferior competitors to local extinction
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TLS Online TPP Program

#Question id: 10585

#Unit 10. Ecological Principles

Per capita birth rate of this population is b and per capita death rate of population is d, N is a population size. What is yield of population per unit time as?
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: 10587

#Unit 10. Ecological Principles

The above pyramid 


Which of the following is not representation of following ecosystem?
TLS Online TPP Program

#Question id: 10588

#Unit 10. Ecological Principles

Following is survival ship curve of species


Which of the following is correct?


TLS Online TPP Program

#Question id: 10589

#Unit 10. Ecological Principles

We have seasonal breeding population of 1,000 organisms increasing at a finite rate of 15% per year. The population size will be after 4 year?
TLS Online TPP Program

#Question id: 10590

#Unit 10. Ecological Principles

Which of the following is correct figure?