Someone please helppp

Which of the following systems in absorbing oxygen and releases carbon dioxide

Plz genetic engineering can be applied to many fields including medicine and agriculture. which of the following is a medical application of genetic engineering? a. giving crop plants recombinant dna so that they would be resistant to herbicides. b. examining a persons pedigree to determine whether they can carry a gene for a genetic disease. c. analyzing a persons dna to see how closely they are related to another person. d. certain genes into bacteria so that they will produce a needed medicine.

Read each description below and determine to which stage of sleep each pertains. then click and drag each box into the appropriate category below.