The recent common origin of humans and chimpanzees is best
shown by:
a
Similarities in their DNA sequences
b
Similar arm and hand bones
C
Similar levels of hairiness
d
The presence of an opposable thumb

Although there are a limited number of amino acids many different types of proteins exist because..

Match the types of competition to their descriptions

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