10. Some desert plants respond to darkness by opening their flowers at night to lure in pollinators. In this situation, a plant's response system is working in conjunction with the __ root system. immune system vascular system. reproductive system.

## Step 1<br />The problem is about the biological systems of plants, specifically focusing on the interaction between different systems in response to environmental stimuli. The scenario described involves desert plants opening their flowers at night, a behavior that is part of their reproductive strategy.<br /><br />## Step 2<br />The key to answering this question lies in understanding the role of each plant system mentioned:<br /><br />### **Root System**: <br />This system is primarily responsible for anchoring the plant and absorbing water and nutrients from the soil. It does not play a direct role in the flowering process.<br /><br />### **Immune System**: <br />In plants, the immune system is involved in defending against pathogens. It is not directly related to the timing of flowering.<br /><br />### **Vascular System**: <br />This system in plants includes the xylem and phloem, which transport water, nutrients, and food throughout the plant. While it supports the overall health and functioning of the plant, it is not specifically involved in the timing of flowering.<br /><br />### **Reproductive System**: <br />This system in plants is responsible for the production of seeds and the process of pollination. The opening of flowers at night to attract pollinators is a reproductive strategy, making the reproductive system the most relevant to the scenario described.<br /><br />## Step 3<br />Therefore, the plant's response system (flower opening at night) is working in conjunction with the reproductive system, as both are involved in the process of pollination and reproduction.