How much does the intensity need to decrease if its 20 decibels

Which mantle is under the crust the upper mantle or the lower mantle i think it's upper let me know if i'm right

In sweet pea, gene c is responsible for color production and gene p is responsible for the purple color pigment. both of them are located on two different loci on different chromosomes. the flowers will be purple only when the plant has the genotypes as c_p_. no color will be produced with genotypes: ccpp, ccpp, ccpp, ccpp. thus, gene c controls the expression of gene p. what pattern of inheritance is exhibited here? a. pleiotropy b. epistasis c. multiple alleles

What is the main fuel source for the work of the cell