Many of earth’s nonrenewable resources are very rare. other nonrenewable resources, such as coal, are abundant but not easily replaced. what would happen if we used up all the coal on earth? a. it is impossible to use all the coal in the world. b. more coal could quickly be formed underneath the earth’s surface. c. there would be no more coal left to use. d. we would make more coal at a factory.

The diagram shows the results when two parents are crossed. the letters represent alleles for a trait that is controlled by three different genes. which best describes this inheritance pattern? multiple allele because a trait is controlled by three different genes polygenic because the offspring have alleles from both parents multiple allele because the offspring have alleles from both parents polygenic because a trait is controlled by three different genes