¿que función desempeña el hospedador en el desarrollo de una enfermedad infectocontagiosa? ¿Que otros insectos, además del mosquito aedes, están implicados en la transmisión indirecta de las enfermedades infectocontagiosas más comunes?

1. variations in a population of moths allow for some of its members to be able to adapt to environmental changes. the better adapted of the moths will be able to survive the change and thus prevail as the “fittest” of the species. (a) describe three mechanisms in which variation can occur within a species population. (b) explain which mechanism or mechanisms would be responsible for the survival of a population of peppered moths better than white moths in an environment affected by industrial soot. justify your answer.

How many chromosomes does each human cell contain? a. 23 chromosomes b. 26 chromosomes c. 43 chromosomes d. 46 chromosomes

What controls activities within a eukaryotic cell?