What would happen if the rock cycle stopped?

Which of the following particles always has a positive charge? a. electronb. neutron c. proton d. ion

What was the purpose of mendel's experiments with dihybrid crosses? a. to determine if dna was a transforming factor b. to determine if traits could be recessive c. to determine if traits affected each other d. to determine if traits had more than one allele

20 the compound al(nh3)2 has atoms of nitrogen.