The desert and tundra are alike because they both have a) extreme daily temperature changes. b) large seasonal variation. c) limited available water. d) sandy soils.

One of the largest seafood exporters to the united states is a. china b. brazil c. mexico d. saudi arabia

The concept of keystone species is controversial among ecologists because most organisms are highly interdependent. if each of the trophic levels is dependant on all others how can we say one is most important

Which entry is in the wrong position in the table?