When a scientific experiment is carried out in a controlled setting, all variables are kept the same except for the variable.
a. environmental
b. observational
c. experimental
d. control

Could someone me with number one you

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

Which of the following typically characterizes a tropical rainforests