Which one of the following elements is found in non-living systems but not found in more than trace amounts in living systems?
A. calcium B. carbon C. hydrogen D. oxygen E. silicon
Answer: E
You might also like to view...
Which phenotype is maintained at a relatively high level within a population that is in a balanced polymorphism? a. Pp b. None of these phenotypes would be maintained in a balanced polymorphism
c. All of these phenotypes will be maintained in a balanced polymorphism. d. PP e. pp
Which process is responsible for the evolution of mitochondria and chloroplasts in eukaryotes?
a. endosymbiosis b. conjugation c. transformation d. transduction
Choanoflagellates are ____
a. heterotrophs b. chemoautotrophs c. autotrophs d. phototrophs e. halotrophs
In Figure 8.2, base 2 is attached to
A) ribose. B) phosphate. C) deoxyribose. D) thymine. E) The answer cannot be determined based on the information provided.