If a plant cell is stripped of its cell wall it forms a protoplast. A protoplast would
A. be connected to adjacent protoplasts by a middle lamella.
B. be surrounded by cellulose.
C. be less rigid than a plant cell.
D. be stronger than a plant cell.
Answer: C
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The neural control centers for the heart ____
a. are primarily stimulatory b. are found in the spinal cord and brain c. influence only heart rate
d. stimulate heart rate and decrease contraction strength e. play a minor role in cardiovascular feedback
While out on a trip to a remote location in South America, you discovered an organism on a beautiful tropical flower. You have no idea about the classification of this organism
What features or characteristics of the new organism should you look for to at least be able to determine the kingdom it belongs to?
How can RNA be distinguished from DNA?
A) RNA does not contain a sugar. B) RNA lacks the base uracil. C) RNA is never found in the nucleus. D) RNA is single-stranded.
Health-care-associated infections involve all the following, except
A. they are only transmitted by medical personnel. B. the patient's resident flora can be the infectious agent. C. Escherichia coli and Staphylococci are common infectious agents. D. medical and surgical asepsis help lower their occurrence. E. they often involve the patient's urinary tract and surgical incisions.