The northern boundary of the distribution of wild madder is defined by A)areas that never drop below freezing. B)the 20^$\circ$ Celsius isotherm. C)the presence of pollinating insects. D)areas that do not go below 4.5^$\circ$ Celsius. E)the frequency of low-intensity fires.

Question

Quizplus · Accepted Answer

The northern boundary of the distribution of wild madder is defined by areas that do not go below 4.5°C, as temperature plays a crucial role in the survival and distribution of plant species.

The Northern Boundary of the Distribution of Wild Madder Is ∘\circ∘

The Northern Boundary of the Distribution of Wild Madder Is $\circ$