Stem cells have determinate cleavage.
Answer the following statement true (T) or false (F)
False
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What can cause a buildup of free radicals that damage the cell —and ultimately, the individual?
What will be an ideal response?
Highly controlled clinical experiments have determined that nonsmokers exposed to ETS have a 20 to 30% higher risk of lung cancer than unexposed nonsmokers
Indicate whether the statement is true or false
Based on Charles Darwin's observations in the Galapagos Islands, why did tortoises in the Galapagos Islands have longer necks than tortoises in dry lowlands?
What will be an ideal response?
You insert a fragment of sheep DNA into a plasmid containing an AmpR gene. You transform bacteria with the recombinant plasmid, and plate the cells on growth media containing the antibiotic ampicillin. Each colony on the plate arose from ________ that ________ to ampicillin.
A. many bacteria; are sensitive B. a single bacterium; is resistant C. a single bacterium; is sensitive D. many bacteria; are resistant