How has Earth changed during our current era? A. The dense forests of the Mesozoic era have died out.
B. Dinosaurs have slowly become extinct.
C. The climate has cooled and become less humid.
D. The ozone layer formed, allowing land-based organisms to live.

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.

Where can you find prokaryotic and eukaryotic cells?

How did the discovery of the rhesus factor affect society? o more patients died from having a transfusion with the wrong rhesus factor 0 new treatments during pregnancy could prevent harm to the developing child. o less donated blood could be used in the treatment of patients. the number of blood types was reduced by half