Some protist cell surfaces have __________, including silica or calcium carbonate.
Fill in the blank(s) with the appropriate word(s).
ECM (extracellular material)
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Which of the following is true about the structure of DNA?
A. Purine and pyrimidine bases are joined by phosphodiester bonds. B. Adjacent bases are stacked on top of each other, one base pair every 0.34 nm. C. Purine and pyrimidine bases are attached to the 1'-carbon of the deoxyribose sugars. D. All of the choices are correct.
Some of the problems with aquaculture include all except
a. converting productive habitat into less productive aquaculture. b. large amounts of fish meal and protein needed to raise biomass. c. pesticides and antibiotics in the tissues. d. increased shrimp for the restaurant trade. e. localized environmental degradation.
Explain why lacOc mutations are cis-acting, whereas lacI mutations can be trans-acting
What will be an ideal response?
Which phrase best describes nucleosomes?
a. eukaryotic DNA associated with histone proteins b. eukaryotic DNA associated with nonhistone proteins c. prokaryotic DNA associated with nonhistone proteins d. prokaryotic DNA associated with histone proteins