Which two ideas did darwin use to explain evolution?

Which of the following best describes the relationship between glucose and complex molecules such as hormones?

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

What is the ecological role of food chains and food webs