Plants which survive seasonal climatic fluctuations from year to year are ________.
A) succulents
B) xerophytes
C) perennials
D) annuals
E) epiphytes
Question 2
The boundary between middle latitude forest and middle latitude grassland is most closely related to the concept of the ________.
A) food chain
B) biome
C) food pyramid
D) ecosystem
E) ecotone