Both primary and secondary succession begin with pioneer species that -

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.

Identify the structure in organisms that do not have kidneys that is adapted to regulate water balance

Everything in the universe originated from a single point. how was it possible for everything in the universe to have occupied a single point in space?