Which process do scientists think provided earth with an oxygen-rich atmosphere?
a. spontaneous generation
b. radiometric dating
c. photosynthesis
d. respiration

How does a lytic infection differ from a lysogenic infection?

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.

All eukaryotic cells contain small bodies called