. María es secretaria, Felipe estudia en el colegio y Francisca es atleta. ¿Qué tipo de
actividad física tiene cada uno y cuántas kcal deben consumir de acuerdo a ello y que tipos
de alimentos deben ser recomendados para tener una alimentación equilibrada y sana?

How does land development destroy ecosystems? it increases human carrying capacity too rapidly. it converts them into residential or agricultural areas. it forces humans to import non-native plants and animals. it expands the natural range of native wildlife species.

When analyzing tree rings, what do scientists assume a thin ring indicates?

Which is an advantage of having memory cells when a pathogen is encountered for a second time. a) the memory cells are what proliferate into clones of cells in response to the binding of an antigen. b) memory cells are vital to the primary immune response in that they immediately recognize pathogens even at the first encounter. c) memory cells are essentially effector cells that are short lived and attack antigens even without having a receptor specific to that antigen. d) it ensures that more lymphocytes with a receptor specific to a particular antigen will be present than in a host that had never encountered that pathogen.