Zoe made the following table to compare prokaryotic and eukaryotic cells.

Structure Prokaryotic cell Eukaryotic cells
Cell wall is present Yes Sometimes
Flagellum for movement Yes No
X is present Yes Yes

Which of the following would best replace X?
DNA
Mitochondria
Nucleus
Vacuole

In a lab, scientists grew several generations of offspring of a plant using the method shown. what conclusion can you make about the offspring? a. they formed from meiosis and mitosis. b. they have half the number of chromosomes as their parent. c. they have low genetic variability among them. d. they will be able to reproduce only after they grow flowers.