What part of the immune system is the "key fighter of foreign particles?"

How many teeth on primary dentition

How much of the body is affected by chemotherapy

What is the function of reverse transcriptase in retroviruses? a) it uses viral rna as a template for dna synthesis.b) it converts host cell rna into viral dna.c) it translates viral rna into proteins.d) it uses viral rna as a template for making complementary rna strands.