True or false. the lymphatic system works like a drain in a sink.

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)

Witch theory suggests all living things are made up of cell or cells