Most or all protist cells have
a. a nucleus.
b. a cytoskeleton.
c. larger ribosomes than those of prokaryotes.
d. mitochondria, ER, and Golgi bodies.
e. all of these.
Answer: e
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The Latin phrase omnis cellula e cellula refers to a cellular principle. Which of the following statements is the best translation of this phrase?
A) Tissues are composed of similar cells. B) Cells generally are found in clusters. C) All cells arise only from preexisting cells. D) Organs are composed of tissues and cells. E) The cell is the basic unit of structure.
Copy number variants
A) are extremely rare, occurring in only about a dozen sites in the genome. B) are found only in even-numbered chromosomes. C) number in hundreds to thousands. D) are five or fewer bases long.
A reaction in which the forward rate is equal to the reverse rate is said to be at ________.
Fill in the blank(s) with the appropriate word(s).
Cell-mediated immunity in part protects against __________.
A) normal cells of the host, producing the cell-mediated immunity B) bacteria free in body fluids C) intracellular bacteria and viruses D) viruses free in body fluids E) toxins