5. If a population is in genetic equilibrium, it can be described as: a. Unchanging b. Balanced c. Evolving. d. Both (a) and (b) 6. Possible reasons for genetic changes to a population are:
a. Natural selection b. Mutation c. Gene Flow
d. genetic drift e. nonrandom mating f. All of the above​

answer: i cant find your answer. do u have another way i can answer it for you : )

explanation:

igneous rocks are formed by solidification of cooled magma (molten rock), with or without crystallization, either below the surface as intrusive (plutonic) rocks or on the surface as extrusive (volcanic) rocks.  

the composition depends on the source magma. there are almost a thousand types of composition found till now.  

hope this

answer; ///the above statement is (true);