Which of the following is/are essential for formation of the cleavage furrow during cytoplasmic division in animal
cells?
a. a contractile ring
b. Golgi body vesicles
c. ATP molecules
d. a contractile ring and Golgi body vesicles
e. a contractile ring and ATP molecules
ANSWER: e
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A. mutation. B. duplication. C. deletion. D. regulation.
When is oxygen produced during the light reactions?
A) NADP+ is converted to NADPH. B) CO2 splits apart at the end of the light reactions. C) Electrons reach the end of the electron transport chain. D) Water is split to provide replacement electrons to chlorophyll.
A researcher brings a sample of dry soil to the lab, wets it, provides ample amounts of fertilizer, and places the soil in a container in a greenhouse. Which type of plant would be least likely to emerge?
A. Corn B. Wheat C. Liverwort D. Pine seedling E. Sunflower
A consistent estimator is an estimator whose:
A. realized value gets close to the population parameter as sample size grows. B. standard errors are small. C. efficiency is achieved in small samples. D. expected value is an unbiased estimate of the true population parameter.