Ancestral character states were present in the ancestor of a clade
1.True
2.False
1
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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.
What group of fungi is largely responsible for the reduction in amphibian populations worldwide?
A. Chytridomycetes B. Glomerulomycetes C. Basidiomycetes D. Microsporidia E. Ascomycetes
Every choice below EXCEPT __________ is a plant
hormone. a. IAA b. abscisic acid c. phytochrome d. cytokinin e. all are hormones
The relationship above is
a. a parasitic association. b. predation. c. resource partitioning. d. a mutualistic association essential to the fish but not the anemone. e. none of these.