What uses mutation rates in dna to estimate the time that two species have been evolving independently.?

The breakdown of food is accomplished by enzymes. a. physical b. chemical c. mechanical d. none of the above

How have high taxes on tobacco products impacted the number of people who use them? a. the number of tobacco users has increased. b. the number of tobacco users has decreased. c. the number of tobacco users has not changed. d. the number of adolescent tobacco users decreased, while the number of adult users increased

During binary fission, what events must occur before the cell splits into two new cells?