The Crenarchaeota and Euryarchaeota are
A. now classified with the bacteria based on genomic sequence analysis.
B. the two phyla of the Archaea.
C. very closely related based on 16S rRNA comparisons.
D. photosynthetic Archaea.
Answer: B
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Gibberellin-stimulated cell elongation occurs via cell wall acidification
____________________ Indicate whether the statement is true or false.
Select the following statements that are related to mass extinctions.
A. The most severe mass extinction occurred at the end of the Cretaceous period. B. Periods of mass extinctions have occurred five times over the history of life on Earth. C. The current level of species diversity is so high it is highly unlikely that another mass extinction could occur. D. A mass extinction occurs when extinctions sharply outpace the formation of new species. E. During periods of mass extinction, dominant groups of organisms are protected and survive to repopulate.
isolating the cell from the external environment and in maintaining homeostasis within the cell
What will be an ideal response?
While rather metabolically limited, Chlamydia reticulate bodies can still synthesize DNA, RNA, glycogen, lipids, and proteins if supplied with precursors from the host.
Answer the following statement true (T) or false (F)