A museum displays different ears of cultivated corn grown at various points in human history. The earliest corn ears are very
small, while the modern ones are very large. What was most
likely the driving force behind this change?

Which group of algae is characterized by unicellular organisms and includes some members that would be better classified as zooflagellates? euglenophytes red algae sporozoans green algae

What are antigens and antibodies? how are they involved in the body’s response to incompatible blood?

Which statement correctly describes other ways in which nebulae and stars are different? a. a star always has a higher density than a nebula. b. stars can form inside a nebula but a nebula can never be produced by any star. c. stars can never form inside a nebula but a nebula can be produced by any star. d. a nebula always has a higher density than a star. reset submit