Middle eastern respiratory syndrome (MERS) is caused by
A) Streptococcus pneumoniae.
B) the influenza virus.
C) a coronavirus.
D) a rhinovirus.
Answer: C
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Stomatal closure is passive because ______________
A. K+ and Cl- diffuse from high to low concentration B. water diffuses from low to high concentration C. ATP is required D. it conserves leaf hydration
According to the theory of endosymbiosis, ________ were once free-living prokaryotic organisms
a. mitochondria and chloroplasts b. all of the choices c. ribosomes d. the nucleus and endomembrane system
Which of the following is an example of a
cartilaginous joint? a. skull plates b. humerus to the scapula c. leg bone connected to the hip bone d. teeth connected to the jaw e. two vertebrae together
The protein class(es) involved in the activation of transcription is (are)
A) general transcription factors (GTFs). B) transactivators. C) coactivators. D) A and B only E) A, B, and C