When atoms interact with one another during chemical reactions, which subtomic particle is directly involved

The image shows embryos of three vertebrate classes

The first amino acid of a new polypeptide chain is

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