Which of the following criteria is most useful in determining whether two organisms are related?
A) Both ferment lactose.
B) Both are gram-positive.
C) Both are motile.
D) Both are aerobic.
E) Each answer is equally important.
B
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Which of the following statements is true of histones?
A) Each nucleosome consists of two molecules of histone H1. B) Histone H1 is not present in the nucleosome bead; instead, it draws the nucleosomes together. C) The carboxyl end of each histone extends outward from the nucleosome and is called a "histone tail." D) Histones are found in mammals, but not in other animals or in plants or fungi.
Many ferns live on other plants without
withdrawing nutrients from them. These ferns are said to be
a. epiphytes. b. bryophytes. c. parasites. d. pathogens. e. saprophytes
What are three proteins or groups of proteins you would expect to find bound to the core promoter region in eukaryotes?
What will be an ideal response?
Shigellosis is typically acquired via the respiratory route.
Indicate whether the statement is true or false.