LIST I  | LIST II  | ||
|---|---|---|---|
| A | Ixeris | I | Precocious desynapsis | 
| B | Allium | II | MMC bypasses meiois | 
| C | Taraxacum | III | Asyndetic meiotic prophase | 
| D | Antennaria | IV | Premeiotic chromosome doubling | 
Rearrange the following parts to form a meaningful and grammatically correct sentence: 
P. a healthy diet and regular exercise 
Q. are important habits 
R. that help maintain good physical and mental health 
S. especially in today's busy world