Why must an in vitro observation be confirmed in vivo?
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A. A living thing does not make its own enzymes.
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B. A test tube is exactly like a living cell.
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c. Some enzymes behave unnaturally in a test tube.
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D. Observations in a test tube are easy to make.

Which step is not included in the step approach to calculating the greatest common divisor?

Darwin’s hypothesis about how life changes over time is now called?

Mr. j, age 42, is a construction worker in las vegas. he recently noticed that a mole on his face seemed to be getting larger and darker. at first he did not worry because he was in the sun a lot and assumed the change may have been caused by sunburn. after a month, not only was the mole larger and darker, but it appeared to be “bumpy.” his doctor diagnosed a malignant melanoma skin cancer following biopsy of the nevus. mr. j reports pain in his right shin that does not go away when he puts his feet up or sleeps. discussion questions 1. relate mr. j’s skin changes to the warning signs for malignant melanoma. (see malignant melanoma.) 2. discuss the normal progression of this malignancy. what is the significance of the bone pain that mr. j is experiencing? (see malignant melanoma.) 3. discuss the treatment available for this patient and the prognosis for recovery. (see malignant melanoma.)