What is true of enzymes?
a. they act as catalysts, age for one specific reaction
b. they speed up or slow down any reaction in a living thing
c. they only slow down reactions
d. they only speed up reactions

Which of the following birds remained ancient looking in the miocene epoch? a. crows b. owls c. grouses d. none of the above

Membrane vesicles containing an internal sodium chloride (nacl) concentration of 0.14 m are placed into separate beakers each containing a different solution. the first beaker contains 0.14 m sucrose, while the second beaker contains 0.14 m calcium chloride (cacl2). the temperature is 25°c. what is the solute potential inside the vesicles, expressed in units of mpa?

Examine the air pressure map. which type of line is shown on the map?