Practice Questions
Passage cells are thin-walled cells found in:
| 1. | endodermis of roots facilitating rapid transport of water from cortex to pericycle |
| 2. | phloem elements that serve as entry points for substances for transport to other plant parts |
| 3. | testa of seeds to enable emergence of growing embryonic axis during seed germination |
| 4. | central region of style through which the pollen tube grows towards the ovary |