We use ________ to catalyze the chemical reactions of digestion
A) polycyclic aromatic hydrocarbons
B) enzymes
C) nucleic acids
D) isotopes
E) alcohol molecules
Answer: B
You might also like to view...
What state has the highest tornado density?
A) Oklahoma B) Texas C) Kansas D) Missouri
What occurs in alley cropping?
A. Crops are planted in strips between trees and shrubs. B. Terraces are built to prevent swift water runoff. C. Crops are planted across slopes. D. Special tillers are used so the topsoil is not disturbed. E. A row crop alternates in strips with another row crop.
This volcano is relatively small and composed of volcanic cinders. What kind of volcano is it?
A. scoria cone B. caldera C. shield volcano D. volcanic dome E. composite volcano
A geologist is working in an area of old volcanic rocks exposed by erosion. He finds a large rock outcrop that contains flat lying gravels in the base of the outcrop
These gravels are overlain by basalt that forms a series of layers representing flows. The uppermost basalt lava flows have a dip of about 10 degrees to the west. What does this outcrop record? A) Gravels were initially deposited in a river valley and a cinder cone was erupted, damming the valley, before a cinder cone formed. B) Basalt flows formed after gravels were deposited, covered the local terrain, and built a shield volcano with dips of about 10 degrees. C) Basalt flows formed above a series of gravels, filling a river valley. D) You can't tell anything about the history of this region from this outcrop.