What plant characteristics can result from primary growth?
A) a short and bushy plant
B) a tall plant with a wide stem
C) a plant with an extensive root system
D) a plant with cork and wood
C
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Use the formulas N = N02n and g = t/n. N = final cell number, N0 = initial cell number, n = number of generations, t = time, g = generation time. Find the generation time if N = 2 à— 108, N0 = 3 à— 106 and t = 3 hours
What will be an ideal response?
Many specialized cells, such as white blood cells, ____
a. remain in G0 until stimulated by external signals to reenter the cell cycle and divide b. remain in S until hormonal signals cause the cell to reenter the cell cycle and divide c. divide continuously and never transition to G0 d. mutate into other cell types by signals from bone marrow cells e. skip anaphase in order to avoid the high likelihood of mutation during this phase of mitosis
What is the mechanism by which expression of an MDR protein affects treatment of cancer cells with an antitumor drug? How might you potentially counter the effect of such transporters?
What will be an ideal response?
You work for a company that manufactures food products. A new "wonder food" is being distributed by a rival company. The researchers in your company determine that the "wonder food" contains only carbon, oxygen, and hydrogen. At this point, your
researchers can say with certainty that the food A) includes proteins. B) could only be made of triglycerides. C) could only be made of carbohydrates. D) does not include proteins or nucleic acids.