Which of these describes a method in studying plate movements? • Collect common fossil evidence from the south American and African plates

•Examine the age of a mountain structure on the African plate only

•Match the size and shape of rocks on the north and south edges of Australia

• Match the rotation of earth to plate movement​

regulation of gene expression. gene expression can be regulated by various cellular processes with the aim to control the amount and nature of the expressed genes. these regulatory proteins bind to dna and send signals that indirectly control the rate of gene expression

explanation:

answer: oof wait

explanation:

i think it’s c but i might be wrong. if i am let me know! have a good rest of your day as well!

a=c and then d= c because of the band so you get ac/dc and you add them together you get sound waves