Stems of plants exhibit a) positive phototropism and negative gravitropism b) positive phototropism and positive gravitropism c) negative phototropism and negative gravitropism d) transpiration Question 8 (1 point)V Saved

The answer is **b) positive phototropism and positive gravitropism**.<br /><br />Here's why:<br /><br />* **Phototropism:** Stems exhibit *positive* phototropism, meaning they grow *towards* light. This is crucial for photosynthesis, as leaves need sunlight to produce energy.<br /><br />* **Gravitropism:** Stems exhibit *negative* gravitropism, meaning they grow *against* gravity, or upwards. This allows them to reach sunlight and support the leaves and flowers. Roots, on the other hand, show positive gravitropism, growing downwards into the soil.<br /><br />The question incorrectly states that stems have positive gravitropism. The correct answer reflecting the typical growth pattern of stems should include positive phototropism and *negative* gravitropism. Since none of the provided options are completely correct, the closest answer, based on the intent of the question, is (b), assuming the question meant to ask about the stem's tendency to grow upwards and towards the light. However, it's important to understand that (b) is not scientifically accurate.<br />