During which phase of mitosis do the chromosomes line up along the middle of the dividing cell

Which element is used in photosynthesis found in atmosphere and fixed by bacteria?

Which codon is the code for the amino acid histidine (his)?

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