Laboratório de Tecnologia Educacional BIBLIOTECA DIGITAL               DE CIÊNCIAS

19cm. The plumage is squamous. The general coloration is brown with some grayish parts. There is a white wingbar (when closed). When flying it shows a pattern of white in the wings and tail. Distribution: From Venezuela to Argentina. Habitat: Inhabits dry fields, cerrado, caatinga and parks in urban areas. Diet: Feeds on grains and fruits on the ground. Reproduction: It is monogamous. Builds a sparse nest in the shape of a cup, 1 or 2m from the ground, sometimes on the ground. The hatchlings (generally 2) are fed on pigeon’s milk that is rich in fat, proteins and lectines. They leave the nest after 15 days. The vocalization is very characteristic and in many places it is named...

Membrane Attack Complex formation through interaction of its complement system constitutive parts. The complex is typically formed on the surface of intruding pathogenic bacteria through activation of the complement system, when C5 convertase cleaves a C5 molecule into C5a and C5b. It is composed of four complement proteins (C5b, C6, C7 and C8), which bind to the outer membrane surface, and of a fifth protein, C9, polymerizing into a ring-like structure, put across the membrane and allowing free diffusion through it. This disrupts the osmotic environment of the cell and kills it promptly.