Final answer:
Kentucky bluegrass is more heat hardy than perennial ryegrass, which is true. Drought-resistant plants typically fare better in warmer climates, and the Southeastern United States played a significant role in plant domestication.
Step-by-step explanation:
In response to whether Kentucky bluegrass has greater heat hardiness than perennial ryegrass, the answer is true. Kentucky bluegrass is known to be more heat tolerant compared to perennial ryegrass, which generally prefers cooler temperatures and can struggle in prolonged heat and drought conditions. This distinction is important for understanding how plant species adapt to different climates and environmental conditions.
Plant species that are drought-resistant tend to thrive in warm temperatures, whereas others that are less tolerant to such conditions would decline in number. This is apparent in grasslands where forest fires are common, and drought-resistant plants would likely have a competitive advantage. It's also worth noting that the Southeastern United States was likely one of the world's independent centers for plant domestication, indicating that plant adaptation and species resilience are critical to survival in varying climatic conditions.