The biologically available carbon that is produced within large, lentic rivers and lakes is called ________.
Fill in the blank(s) with the appropriate word(s).
autochthonous
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The Pribnow box of E. coli
A. is centered approximately 10 bp upstream of the start site of transcription. B. is centered between 7 and 13 bp upstream of the start codon. C. is located at the site of addition of poly (A) in eukaryotic mRNAs. D. is centered approximately 35 bp upstream of the start site of transcription.
Recall the classic experiments that Charles Keeling performed at Mauna Loa (Figure 25.1). What did Keeling's research reveal about atmospheric CO2 levels?
A. that atmospheric CO2 levels fluctuate seasonally B. that atmospheric CO2 levels are lowest during the spring C. that atmospheric CO2 levels remain constant throughout the seasons D. that atmospheric CO2 levels have decreased over the last 50 years E. All of the answers options are correct.
Ocean currents in the Northern Hemisphere such as the Gulf Stream run in what direction?
A. counterclockwise B. clockwise C. north to south D. south to north E. always from the tropics to the pole
Which of the following is not true concerning the fetus during the third month of development?
A. It is possible to distinguish males from females. B. Fingernails, nipples, eyelashes, eyebrows, and hair on the head appear. C. Bone begins to be replaced with cartilage in certain areas of the skeleton. D. The nose, eyes, and ears are present. E. Head growth slows down as the rest of the body increases in length.