Postular una hipotisis de una situación expimental. situción expirimental: Una molecula obtenida de una bacteria virulienta es mezclada con una bacteria avirulienta e inyectada en un ratón, el ratón muere.

Which of the following statements is true? a. the main cause for speciation is an increase in gene flow. b. organisms that reproduce asexually are not considered part of a species. c. on a tree of life diagram, speciation is shown by the merging of two different lineages. d.the size of the geographic area inhabited by a population can cause speciation.

World class speed skaters can skate a 3,000-m course in about 4 minutes. what is their average speed for this course. a. 12.5m/s b. 1.33m/s c. 13.3m/s d. 1.25m/s

Regarding most of the narrator’s story, which word best describes the tone?