Sigma factor is part of the _____________ complex
A. DNA polymerase
B. Tryptophan operon
C. Lactose operon
D. RNA polymerase
E. Reverse Transcriptase
Ans: D. RNA polymerase
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Ciliates, such as Paramecium, are likely to be found in ____ or in the gut of mammalian grazers where they aid in the
digestion of _____.
a. seawater; animal flesh b. seawater and freshwater; plant material c. freshwater; animal flesh d. acidic hot springs; soil minerals e. seawater and acidic hot springs; plant material
The symplast:a
greatly increases the surface area of the root. b. is a waterproof band surrounding the endodermis. c. is a continuum of living cytoplasm. d. secretes suberin, which waterproofs the cells. e. allows nutrient minerals to move against their concentration gradient
The reason why some specialty breeds of dogs are more prone to genetic disease is because of genetic
drift.
Indicate whether the statement is true or false.Which of the following prokaryotic nutritional
groups use CO2 and sunlight to produce energy? a. photoautotrophs b. chemoautotrophs c. photoheterotrophs d. chemoheterotrophs e. all of these