Which of the following forms of homeostasis would not be affected by a severe burn involving both the epidermis and dermis?
A) control of water loss by the integumentary system
B) protection from microbes by the integumentary system
C) defense against microbes by the immune system
D) sensation of external temperature
Answer: C
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Modern automated sequencing machines detect DNA bands by measuring incorporated radioactivity.
Answer the following statement true (T) or false (F)
Escherichia coli and Clostridium acetobutylicum are reported to be derived from a common ancestor. They have some similar, but not identical gene sequences. What is the best explanation for this difference in genetic coding?
A. After the two species diverged, the similar gene sequences evolved through convergent evolution. B. The two species never diverged, but were discovered by two different scientists and given different names. C. After the two species diverged, the genes accumulated random mutations that resulted in similar, but not identical gene sequences. D. The two species are not closely related, but E. coli passed the similar gene sequences to C. acetobutylicum via horizontal gene transfer.
The private attempt to sequence the human genome, coordinated by Celera Corporation, used a method called
____________________ cloning. Fill in the blank(s) with the appropriate word(s).
Methicillin is an example of the beta-lactam class of drugs that
A) disrupts cytoplasmic membranes. B) inhibits cell wall synthesis. C) inhibits nucleic acid synthesis. D) inhibits metabolic pathways. E) inhibits protein synthesis.