Is there any evidence to prove that the earth is spherical​

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.

Tides that occur during the new and full moons

What should be the strand of complementary dna produced by the strand of dna shown below cgt ata