When lichens grow on bare rock, they may eventually accumulate enough organic material around them to supply the foothold for later rooted vegetation. these early pioneering lichens can be said to do what to the later arrivals? a) tolerate b) inhibit c) facilitate d) exclude e) concentrate

What would be the most likely result if the ph of the stomach were increased to 5

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 amount of heat is exchanged when 106.2 grams of substance y goes from a liquid at 35 degrees