What is a good that last at least 3 years?

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.

Which of the following is an oxidation-reduction reaction? (pictured below)

Which geologic feature would most likely be represented by contour lines john far apart from one another? a cliff a hill a plain a valley