Which one of the following is NOT directly involved in the production of a typical spinal reflex?
A) brain
B) sensory neuron
C) motor neuron
D) interneuron
E) stimulus
A
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In vertebrates, DNA methylation - the addition of a methyl group to DNA nucleotides - ensures that
A. the gene functions without interruption. B. no errors will be made during transcription. C. the nucleosome will quickly form, which assists in mRNA formation. D. once that gene is transcribed, the mRNA is saved and used over and over again. E. once a gene is turned off, it will remain off.
An island is on the migration route of sea birds. This island also has abundant tree nesting birds that live on the island permanently and are not found on any other island. The tree nesting birds are more likely than the sea birds to be in Hardy-Weinberg equilibrium because:
A. the sea bird population is larger. B. there are fewer mutations in the sea birds. C. mating is random in the tree nesting birds. D. of high immigration in the sea bird population. E. natural selection is stronger in the tree nesting birds. Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? · What key words does the question contain and what do they mean? Gather Content · What do you already know about the Hardy-Weinberg principle? How does it relate to the question? Consider Possibilities · What other information is related to the question? Which information is most useful? Choose Answer · Given what you now know, what information and/or problem solving approach 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?
The compound that is an organic base containing chlorine and two phenolic rings, and is used increasingly for wound degerming, neonatal washes, hand scrubbing, and prepping surgical skin sites is ________.
A. a quaternary ammonium compound B. triclosan C. carbolic acid D. formalin E. chlorhexidine
________ is (are) associated with 85% of the cases of threatened and endangered species.
A. Exotic species B. Pollution C. Habitat loss D. Overexploitation E. Disease