1) Variables that are not or cannot be controlled that could interfere with an experiment are called . A. controlled variables
B. extraneous variables
C. dependent variable
D .control group
E. independent variable

Some mining processes involve removal of large areas of earths surface in the mined region this practice causes severe environmental damage by allowing which natural process to accelerate in the affected areas? a.precipitation b.erosion c.migration d.condensation

2. sketch the inside of the bean nodule, and describe or label what you observed with the hand lens.

Which of the following would involve looking at different structures of organisms and comparing how similar they are? a. vestigial structuresb. radiometric datingc. homologous structures