Lichens, represented by this symbiotic relationship, are responsible for or the establishment of a new site for plant growth.
a) primary succession
b) secondary succession
c) trophic metamorphosis
d) ecological infiltration

Which of the following is the most likely result of converting forestland to urban development? a. the amount of land available for lumber production decreases. b. fewer trees are needed because cities are made mainly of concrete. c. people discover more efficient ways to grow trees. d. the price of lumber goes down.

Greenthe fossil record is the history of life recorded byhuman observationgod. climatologists. remains of the past.

In "the man in the water," what was the remarkable occurrence that rosenblatt reported?