Bacterial responses to phage infection can be compared to the human immune system. Which of the phrases is true?
A. Restriction-modification can be compared to adaptive immunity and CRISPR/Cas to innate immunity.
B. Restriction-modification can be compared to the complement system and CRISPR/Cas to inflammation.
C. Restriction-modification can be compared to B cell responses and CRISPR/Cas to T cell responses.
D. Restriction-modification can be compared to innate immunity and CRISPR/Cas to adaptive immunity.
Answer: D
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An action potential can always be initiated specifically at which of the following locations associated with a neuron?
A) ion channels B) synaptic boutons C) nodes of Ranvier D) both choices A and B E) none of the above
The concept that two species cannot occupy the same ecological niche at the same time is called
A) coevolution. B) succession. C) mutualism. D) the competitive exclusion principle. E) predation.
An endocrine gland isĀ
A. required for remodeling bone. B. restricted to the production of growth factors. C. where neuronal signals are generated. D. the site at which hormones are produced and released into the blood.
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a) (i) calcium (ii) vessel b) (i) hydrogen, (ii) neuron c) (i) hydrogen (ii) vessel d) (i) calcium, (ii) neuron