"in the experimental setup below, which substance would be used to prove that the gas produced by the yeast in the vacuum bottle could change the ph of the liquid in the flask?
(1)an indicator
(2)a chemical messenger
(3)an enzyme
(4)a salt solution"

Which of the following is the most likely result of converting forestland to urban development? a.the amount of land available for lumber production decreases. b.fewer trees are needed because cities are made mainly of concrete. c.people discover more efficient ways to grow trees. d. the price of lumber goes down.

What is used to keep track of the gamates and possible offsprings combination

Mineral rich water heated by newly found oceanic crust escapes through cracks in the ocean floor called