What is the functional unit of the kidney?
A) renal unit
B) Bowman's capsule
C) nephron
D) glomerulus
Answer: C
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Choose the description below that best matches the current model of RNA polymerase holoenzyme.
A. A core enzyme composed of five sigma factors bound by a polypeptide chain. B. A core enzyme composed of five polypeptides bound by ribosomes. C. An open complex or "bubble" formed by DNA, mRNA, and RNA polymerase. D. A core enzyme composed of five polypeptides bound by a transcription factor.
Another toxin that also blocks neurotransmitter release is tetanus toxin; however, it primarily affects inhibitory interneurons of the spinal cord that negatively regulate motor neurons. Which would be symptoms of tetanus toxin poisoning?
A. flaccid paralysis B. spastic paralysis C. slowed action potential conduction D. pupil dilation Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? Gather Content/Choose Answer · What do you already know about tetanus? What other information is related to the question? Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
The following F1 cross is made: BBGg × Bbgg. Which is not a possible outcome in the F2 generation?
A) BbGg B) BbGG C) BBgg D) BBGg
You hang a microscope slide from a submerged, L-shaped PVC pipe in lake water that is 2 feet deep. The slide hangs 6 inches below the surface of the water and remains there for eight weeks. When you remove it and bring it to your lab for observation, you
see that algae, bacteria, and even some fungi have colonized the slide. You determine that you are looking at a(n) A) biofilm. B) community of eukaryotes. C) biological weapon. D) endotoxin.