Phylogenetic systematics produces branching diagrams called:a
phylogenic trees.
b. cladistic trees.
c. phenograms.
d. molecular clocks.
e. cladograms.
E
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During the elongation stage of transcription
a. DNA nucleotides are added to the transcript. b. the transcript grows in the 5'?3' direction. c. helicase unwinds the DNA. d. the double helix remains single stranded after being used as a template e. RNA polymerase binds the promoter region
Lichens take up nutrients and pollutants from airborne dust, so many cannot survive where the level of air pollution is high. The U.S. Forest Service monitors lichens on tree trunks as part of its program to assess the health of forest communities. Lichen is a(n) ____
a. pioneer species b. indicator species c. primary succession species d. keystone species e. exotic species
The most common autosomal abnormality seen among humans is
A) Edwards syndrome. B) XXY. C) Patau syndrome. D) a deletion in chromosome 5. E) trisomy 21.
The process of filtration is a(n)
A) disinfectant method. B) sterilizing method. C) sanitization method. D) antiseptic procedure. E) ineffective method for removing microbes.