When runoff containing excessive nutrients enters streams and lakes it can result in an overgrowth of cyanobacteria and algae, a process known as
A. eutrophication.
B. oxidation.
C. fixation.
D. ammonification.
E. both ammonification and fixation.
Answer: A
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When gibberellin binds to its receptor, what happens to activate the gibberellin-dependent transcription factor GA-TRXN?
A. Ethylene is released. B. A ubiquitin tag is used to degrade the GA-TRXN inhibitor. C. A DELLA protein is degraded, freeing the GA-TRXN. D. A DELLA protein is attached to GA-TRXN to activate it. E. The gibberellin is transferred to an alternate binding site.
Which of the following statements about incinerators if FALSE?
a. Incinerators reduce the volume of material that needs to be landfilled. b. Incinerators are expensive to build and operate. c. The burning of waste reduces the toxic and hazardous materials in the waste stream as the heat neutralizes the toxins. d. Burning solid waste in incinerators can be used to produce energy.
Formation of a retinoblastoma eye tumor requires:
A. A germinal mutation in one Rb allele B. A somatic mutation that turns on the Rb gene C. A germinal mutation in one Rb allele, then a somatic mutation in the other allele D. A germinal mutation in the dominant Rb allele E. Activation of the X-linked oncogene Rb
Only dendritic cells produce interleukins
Indicate whether the statement is true or false