Question 21N.1A.HL.TZ0.5
| Date | November 2021 | Marks available | [Maximum mark: 1] | Reference code | 21N.1A.HL.TZ0.5 |
| Level | HL | Paper | 1A | Time zone | TZ0 |
| Command term | Question number | 5 | Adapted from | N/A |
The graph shows the mitotic index in the roots of lentil plants at different distances from the end of the root.
[Source: Physiologia Plantarum, Volume 105, Issue 1, January 1999, Pages 171–178, Effect of microgravity on the cell cycle
in the lentil root F. Yu, D. Driss-Ecole, J. Rembur, V. Legué, G. Perbal Wiley Online Library: https://onlinelibrary.wiley.
com/doi/abs/10.1034/j.1399-3054.1999.105125.x]
What can be deduced from the graph?
A. As the distance from the end of the root increases, more cells are undergoing mitosis.
B. At 0.5 mm from the end of the root, most of the cells are in prophase.
C. There were fewer cells observed at 1.5 mm than at 0.5 mm.
D. As the distance from the end of the root increases, the percentage of cells in interphase increases.
[1]
D
