Name the following phases of the cell cycle. Note: The pictures are in no particular order. 1:

2:

3:

4:

5:

In addition to seeds, which of the following characteristics are unique to the seed-producing plants? a) sporopollenin b) lignin present in cell walls c) pollen d) use of air currents as a dispersal agent e) megaphylls

Which of these serves as a reference for comparison during a scientific investigation? a)outcome variable (dependent variable) b) test variable (independent variable) c)control group d)hypothesis

Apaleontologist finds a plant fossil that shows that the plant had seeds. what can the paleontologist conclude?