Are all marine plants highly tolerant of salt?
Yes, marine plants have to cope with all the salts dissolved in sea water or they would die. Water moves into and out of cells by osmosis and all living things have evolved mechanisms to control how much water is taken in or lost. Why does the sunflower follow the sun? Plants need sunlight for energy to grow, and they grow towards the light. This is called phototropism. You can test this by growing some seedlings near a window and watch them grow towards the light. What do plants eat? Plants use energy from sunlight, and water, air and minerals dissolved in water to make their own food – in the form of sugars and starch. So plants don’t eat as such, but they are eaten by animals for food. An exception to this general rule is the group of plants like the venus fly trap that ‘eat’ insects and other small animals. Do carnivorous plants digest anything larger than insects? In the wild, pitcher plants have been found to contain larger insects (e.g. cockroaches, centipedes) but also scorpion
