Binding of erythropoietin to its extracellular receptor engages which of the following signaling pathways?

a. JAK/STAT                                                  b. Ras/MAP kinase

c. PI-3 kinase                                                  d. TGF-β

TLS Online TPP Program

#Question id: 12597

#Unit 10. Ecological Principles

Probably the most important factor(s) affecting the distribution of biomes is (are)

TLS Online TPP Program

#Question id: 12598

#Unit 10. Ecological Principles

In the development of terrestrial biomes, which factor is most dependent on all the others?

TLS Online TPP Program

#Question id: 12599

#Unit 10. Ecological Principles

What is the most important role of photosynthetic organisms in an ecosystem? 

TLS Online TPP Program

#Question id: 12600

#Unit 10. Ecological Principles

Ecosystems are

TLS Online TPP Program

#Question id: 12601

#Unit 10. Ecological Principles

The total biomass of photosynthetic autotrophs present in an ecosystem is known as

TLS Online TPP Program

#Question id: 12602

#Unit 10. Ecological Principles

Aquatic primary productivity is most limited by which of the following?