Fossils found in strata reveal that ________.

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#Question id: 27775

#Research Methodology

________ is data-based, coming up with conclusions that are capable of being verified, by observation or b experiment.

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#Question id: 3677

#SCPH28 | Zoology

Which protein can catalyze the formation of phosphodiester bonds?

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#Question id: 5556

#SCPH01 Biochemistry

Contact of a sea urchin egg with signal molecules on sperm causes the egg to undergo a brief ________.

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#Question id: 2943

#SCPH05 I Biotechnology

Which of the following is NOT a mechanism by which G1/S cyclin-CDKs ensure progression through the cell cycle?

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#Question id: 14269

#SCPH05 I Biotechnology

An activated-sludge waste treatment system is required to reduce the amount of BOD₅ from 1000 mg/l to 20 mg/l at the exit. The sedimentation unit concentrates biomass by a factor of 3. Kinetic parameters are µ_m = 0.2 h-1 , K_s = 80 mg/l, k_d = 0.01 h-1 , and Y ^M _X/S = 0.5 g MLVSS/g BOD₅. The flow of waste water is 10000 l/h and the size of the treatme nt basin is 50,000 l. What value of the recycle ratio must be used?

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