The letters that make-up the genetic code for a trait O a. genotype
O b. trait
O c. heterozygous
O d. phenotype

i am going to guess that it is co2.

those characteristics are cellular organization, reproduction, metabolism, homeostasis, heredity, response to stimuli, growth and development, and adaptation through evolution. some things, such as a virus, demonstrate only a few of these characteristics and are, therefore, not alive