| Date | May 2012 | Marks available | 3 | Reference code | 12M.2.HL.TZ2.4 |
| Level | Higher level | Paper | Paper 2 | Time zone | Time zone 2 |
| Command term | Suggest | Question number | 4 | Adapted from | N/A |
Question
Angiospermophyta have vascular tissue (xylem and phloem) that bryophyta lack. Suggest advantages that vascular tissue confers.
Markscheme
would make it easier to stand upright (against gravity)/structural support / allows (angiospermophytes) to be bigger;
could put leaves higher in the air to get more sunlight;
transport of water supply/nutrients from roots to other tissues;
could (more efficiently) transport/translocate sugars/food from leaves for storage;
Examiners report
Many students stated the function of vascular tissue, but did not adequately discuss why it allows for functionality not present in bryophytes. Bryophytes can also move water and carbohydrates into cells. Vascular plants are able to move these across greater distances from source tissues to sink tissues.
