Stimulation of glucocorticoid synthesis by IL-1:

TLS Online TPP Program

#Question id: 12436

#Unit 10. Ecological Principles

A diagram of a food web, for the following questions. (Arrows represent energy flow and letters represent species.)

If this were a terrestrial food web, the combined biomass of C + D would probably be

TLS Online TPP Program

#Question id: 12461

#Unit 10. Ecological Principles

A diagram of a food web, for the following questions. (Arrows represent energy flow and letters represent species.)

If this were a marine food web, the smallest organism might be

TLS Online TPP Program

#Question id: 12462

#Unit 10. Ecological Principles

For most terrestrial ecosystems, pyramids of numbers, biomass, and energy are essentially the same-they have a broad base and a narrow top. The primary reason for this pattern is that

TLS Online TPP Program

#Question id: 12463

#Unit 10. Ecological Principles

Which of the following is primarily responsible for limiting the number of trophic levels in most ecosystems? 

TLS Online TPP Program

#Question id: 12464

#Unit 10. Ecological Principles

A secondary consumer, such as a fox, receives what percent of the energy fixed by primary producers in a typical field ecosystem?

TLS Online TPP Program

#Question id: 12465

#Unit 10. Ecological Principles

Which statement best describes what ultimately happens to the chemical energy that is not converted to new biomass in the process of energy transfer between trophic levels in an ecosystem?