Yes because igneous rocks are made from lava that cools in or outside of a volcano and sedimentary rocks are simply made of sand rocks and other things that just stick together in layers and forms a rock. I don't know if I'm being clear though... Sorry I speak French but I hope I helped :)
Answer:
It's important for a scientist to try to hold all variables constant except for the independent variable. If a control variable changes during an experiment, it may invalidate the correlation between the dependent and independent variable. When possible, control variables should be identified, measured, and recorded.
-DNA is the blueprint for proteins, which play many roles in the body. PROTEINS play many roles in the body and determine many traits. The section of DNA that codes for a specific trait is called a GENE. In fruit flies, straight wings are dominant and curly wings are recessive.
