Which of the following is an example of symbiosis?
a. barnacles living on a whale’s skin
b. a tree obtaining nutrients from the soil
c. phytoplankton absorbing the sun’s rays
d. a blue whale feeding on zooplankton

Which of the following is an oxidation-reduction reaction? (pictured below)

What effect does plate tectonics have an organic evolution

How is the national wildlife refuge system similar to the pacific region coastal program? a. both programs are concerned with providing habitats for wildlife b. both programs are primarily concerned with preserving fish species c. both programs have set aside 150 million acres of land d. both programs are under the u. s. fish and wildlife service