Give reasons: 1. A closed can containing dried. seeds bursts open, if some water enters it accidentally. 2. Jellies, jams and pickles do not get spoiled easily. 3. The roots of some plants are seen growing out through crevices unturned walls. 4. Freshwater fish cannot survive in sea water. 5. Plants growing in well fertilized soils wilt if the soil is nit watered. 6. Potato cubes when placed in water become firm and increase in size.