What number is the Pilus?
What will be an ideal response?
11
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The fossil record shows life originated on Earth at least 3.5 billion years ago and was comprised entirely of microorganisms. What sort(s) of fossils have been discovered by paleontologists provide the strongest evidence of this conclusion?
A. bacterial microfossils B. stromatolites C. isotopic analysis of carbon in sedimentary rocks (derivatives of biomolecules from once living organisms) D. fossil fuels (crude oil, coal)
Which of the following is the correct order of development zones, starting from the tip of a growing plant root?
A. zone of cell division, zone of cell expansion, zone of cell differentiation B. zone of cell differentiation, zone of cell expansion, zone of cell division C. zone of cell expansion, zone of cell division, zone of cell differentiation D. zone of cell differentiation, zone of cell division, zone of cell expansion E. zone of cell division, zone of cell differentiation, zone of cell expansion
You are working with a gene associated with an essential pathway that is necessary at two time points in an organism's lifetime. With regard to gene regulation, you would expect the gene to be
A) constitutive. B) associated with response to distinct events. C) induced by particular signals. D) repressed by particular signals. E) associated with response to distinct events through induction and repression signals.
Using an alcohol pad before taking a blood sample is an example of antisepsis.
Answer the following statement true (T) or false (F)