"Alkenes can be used to make polymers. Polymers are very large molecules made when smaller molecules join together, end-to-end. The smaller molecules are called Monomers. In general: lots of monomers molecules ----- a polymers molecule"
Answer:
D
Explanation:
Index fossils are the basis for defining boundaries in the geologic time scale and for the correlation of strata. They also have a wide geographic distribution and a short range through time
1. the independent variable (the thing the person is changing) is the different type of mouthwash. the dependant variable (the affect of the independent variable) is how much bacteria the mouthwash kills
2. the independent variable for this one would be the plants growing in soil or water, and the dependant variable is how do the plants grow.
