Which is NOT a benefit of the understanding of evolution to understanding the field of biology?
A) Understanding evolution helps us to understand molecules.
B) Understanding evolution helps us to analyze ecosystems.
C) Understanding evolution helps advance biotechnology and medicine.
D) Understanding evolution helps us to understand why stars and galaxies change over time.
D
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Beta-blockers are a class of drugs that target beta-adrenergic receptors, blocking the action of epinephrine and norepinephrine. These drugs are used to treat heart conditions, hypertension, glaucoma, and migraine headaches and are also used off-label to alleviate stage fright in performers. Since the beta-adrenergic receptor is a GPCR, what intracellular event is prevented by the use of a beta-blocker?
A. a protein kinase cascade, initiated by the receptor's intracellular kinase domain B. release of an activated G protein subunit bound to GTP C. transport of the receptor-hormone complex into the cell and the nucleus, where it would regulate transcription D. a protein phosphatase cascade, initiated by the receptor's intracellular phosphatase domain Clarify Question What is the key concept addressed by the question? What type of thinking is required? Gather Content What do you already know about G protein-coupled receptors? What other information is related to the question? Choose Answer Given what you now know, what information is most likely to produce the correct answer? 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?
Outbreaks of which protozoan disease have been associated with fecal-contaminated imported raspberries, fresh greens, and drinking water?
A. Cryptosporidiosis B. Toxoplasmosis C. Trichinosis D. Cyclosporiasis
Attenuation is known to occur in the lac operon
Indicate whether the statement is true or false
An atom can get rid of vacancies by participating in a ___________.
A. cell bond B. physical bond C. chemical bond D. magnetic bond E. electric bond