Which of the following statements is TRUE?
a. Mosses have xylem and phloem.
b. Mosses have true leaves.
c. Mosses have true stems.
d. Mosses have rhizoids, not roots, for attachment.
e. Mosses have independent sporophytes.
Answer: d
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Which one of the following is least likely to be found in a nucleotide?
A. one or more phosphate groups B. a five-carbon sugar C. a side chain D. a nitrogen-containing base E. All of the answer choices are equally likely to be found in a nucleotide.
Members of the genus Micrococcus are frequently pigmented and may grow in yellow, red, or orange colonies.
Answer the following statement true (T) or false (F)
In 1918, the tsar and tsarina of Russia and their five children were presumably assassinated and buried in an unmarked grave
Later, several women came forward and claimed that they were in fact Anastasia, one of the daughters whose bones had not been found. More recently, forensic scientists have extracted DNA, including mtDNA, from the skeletal remains. Which of the following samples of mtDNA had to be analyzed to discern which, if any, of the claimants was Anastasia? A) the tsar, tsarina, and the other assassinated children B) each of the claimants or their living children C) the tsarina and the claimants D) the tsar and tsarina only E) the tsar and tsarina and living relatives of each of them
Peritrichous bacteria make a run when
a. the flagella turn clockwise and become bundled. b. the flagella turn counterclockwise and separate. c. the flagella turn counterclockwise and become bundled. d. the flagella turn clockwise and separate.