What is the role of dna helicase in the replication of dna?

Exit what always affects measurement error in an experiment? a. investigator bias b. variability in nature c. instrument precision d. misreading the instrument

Which of the following produces carbon dioxide? a. plants b. animals c. decomposers d. all of the above

Which of the organisms listed below performs nitrogen fixation? a. legumes b. plants c. bacteria d. fungi