All theories of the origin of life on Earth must explain which of the following phenomena?
A The conversion of atmospheric oxygen into carbon dioxide
B The formation of landforms suitable for life on continental crust
C How consciousness arises from the activity of a complex nervous system
D How organic molecules can be formed from inorganic molecules

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.

Cells destroy body cells infected by a virus or bacteria. killer t t memory t none of the above

Connection compare and contrast genetic engineering to the process of natural selection. select all statements that are true.