Current classification of prokaryotes is based on
A. sequencing of proteins, DNA, and RNA.
B. type of colony formation.
C. morphology of flagella.
D. occurrence of transverse binary fission.
E. ability to stain the cell wall with Gram stain.
Answer: A
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The region where freshwater from a river and saltwater mix is a(n):
a. limnetic zone b. estuary c. intertidal zone d. upper littoral zone e. profundal zone
The myosin power stroke in muscle contraction is triggered when _____ is released
Fill in the blank(s) with the appropriate word(s).
Each of the following mechanisms plays a role in the return of blood to the heart via veins EXCEPT which one?
A) osmotic pressure exerted by plasma proteins in the blood B) squeezing action of skeletal muscles C) valves that permit the one-way flow of blood returning to the heart and prevent backflow D) pressure changes in the abdominal and thoracic cavities associated with breathing
The Greek term for "molten" or "able to flow" is the root word for
A. subduction. B. transform. C. tectonics. D. sedimentation. E. fossil.