Which of the following describe a role that ethylene plays in plant physiology. Check all that apply.
_____ Retarding stem and root elongation.
_____ Hastening the ripening of fruit.
_____ Inhibition of leaf abscission.
_____ Inhibition of lateral bud growth.
_____ Accelerates the loss of damaged fruits.
__X__ Retarding stem and root elongation.
__X__ Hastening the ripening of fruit.
_____ Inhibition of leaf abscission.
__X__ Inhibition of lateral bud growth.
__X__ Accelerates the loss of damaged fruits.
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You are studying 12 new isolates from the human skin. The isolates have 16S rRNA sequences that are 97% similar and share important phenotypic traits. Their genomes have 55% of their genes in common. The isolates would most likely be
A) classified as individual strains of the same species. B) classified as individual species of the same genus. C) split into different families. D) classified as the same species if they can mate via conjugation.
Which technique can be used to identify a protein of interest after a two-dimensional gel electrophoresis experiment?
A. DNA microarray B. Treatment with reverse transcriptase to isolate the DNA of interest C. BLAST analysis D. Mass spectrometry
Freshwater aquatic organisms are faced with the problem of preventing excessive uptake or retention of water
Indicate whether the statement is true or false
Among the natural defenses present in tears is the protein lactoferrin. As you can infer from its name, it is also present in milk and other body secretions, and its function involves binding iron ions. The presence of lactoferrin in tears is protective against bacterial infection because
A. pathogens with magnetosomes will be segregated from the eye tissue and swept away by the tears. B. free iron serves as an immune signal to recruit T cells to the eye. C. in the presence of lysozyme, as found in tears, the proteins form a protective barrier on the lens. D. all pathogens must acquire iron from their environment and lactoferrin ensures that the iron concentration is low.