The term complement refers to a set of serum proteins that cooperates with both the innate and the adaptive immune systems to eliminate blood and tissue pathogens. 

TLS Online TPP Program

#Id: 6052

#Unit 10. Ecological Principles

Tropical Grassland or Savanna 

These are hot, tropical areas, averaging 24–29ºC with a low or seasonal rainfall of between 70 and 130 cm per year.

As with grasslands, the predominant mammals are the grazers. 

 In Africa, the large herds of grazing animals provide food for many different kinds of large carnivores (lions, hyenas, leopards). 

The world’s greatest assemblages of large mammals occur in the savanna biome.

TLS Online TPP Program

#Id: 9569

#Unit 11. Evolution and Behavior

Dollo’s law:  A biological generalization positing that complex characters, once lost in evolution, are extremely unlikely to reappear and thus the loss of complex characters is virtually always irreversible.

TLS Online TPP Program

#Id: 6565

#Unit 7. System Physiology – Animal

TLS Online TPP Program

#Id: 1020

#Unit 5. Developmental Biology

Specification of the ectoderm is accomplished during gastrulation, by regulating the levels of BMP.

TLS Online TPP Program

#Id: 536

#Unit 2. Cellular Organization

Surface area/volume ratio of bacteria is high compared to the same ratio for larger organisms of similar shape.