Why is serving important for net/wall sports? A. it is an easy way to score a point

B. it throws off the defense

C. it is necessary to start a legal match

D. all of the above
PlZ HELP ME

Group of genes that encode molecules found in all body cells, creating a biochemical “fingerprint” that serves as the “id” for cells so that they are marked as “self” a) deoxyribonucleic acid (dna) b) entry inhibitors c) major histocompatibility complex (mhc) d) non-nucleoside reverse transcription inhibitors (nnrtis)