Peptide bond formation is catalyzed by an RNA molecule in
A) prokaryotes.
B) eukaryotes.
C) yeast only.
D) cyanobacteria.
E) both choices A and B
E) both choices A and B
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In the figure above, where do we find the highest species richness?
A) Community 1 B) Community 2 C) Community 3 D) Community 4 E) Communities 2 and 4
Explain why the discovery of iron-oxidizing phototrophs has important implications for both understanding the evolution of photosynthesis and explaining the large deposits of ferric iron (Fe3+) found in ancient sediments on Earth
What will be an ideal response?
Potassium-40 is useful in determining the age of a fossil
A. in samples less than 25,000 years of age. B. in samples of 40,000 to 50,000 years of age. C. in samples 300,000 years of age and older. D. in samples aged between 50,000 and 100,000 years of age. E. in samples aged between 100,000 years and 250,000 years.
Forceful extension of the spine is recommended to stretch abdominal muscles.
a. true b. false