4. Plants have organs and tissues, just like animals. Which of the following correctly compares the structure and function of stoma (plural: stomata) in plants to a familiar organ in the human body? (1 point)
1. A stoma is like a brain, because it controls all transport of water in the vascular system
2. A stoma is like a stomach, because it chemically digest compounds needed for photosynthesis
3. A stoma is like a mouth, because it allows for exchange of gasses with the outside environment
4. A stoma is like a heart, because it pumps water through the roots of a plant