Which of the following can occur when steroid hormone binds to its cognate receptor?

a. conformational changes in the receptor

b. translocation of the receptor out of the cell membrane

c. binding of the receptor to DNA response elements

d. stimulation of transcription

TLS Online TPP Program

#Question id: 11361

#Unit 10. Ecological Principles

Which of the following tends to stabilize predator-prey relationships?

TLS Online TPP Program

#Question id: 11362

#Unit 10. Ecological Principles

Within a trophic level, this term refers to groups of species that feed on similar resources and often have similar ways of life.

TLS Online TPP Program

#Question id: 11363

#Unit 10. Ecological Principles

Competition among individuals belonging to the same species is referred to as _________ competition.

TLS Online TPP Program

#Question id: 12109

#Unit 10. Ecological Principles

Niches of two coexisting species of pond snail of the same genus are likely to be similar, but not identical, because of which of the following?

I. Closely related species use similar resources.

II. Competitive interactions exist between these species. 

III.  Unlimited resources are available.

TLS Online TPP Program

#Question id: 12110

#Unit 10. Ecological Principles

Which of the following has the smallest biomass?

TLS Online TPP Program

#Question id: 12111

#Unit 10. Ecological Principles

Which of the following is a tertiary consumer?