Which of the following pertain to movement of plants?
A. phototropism
B. nastic movements
C. gravitropism
D. thigmotropism
E. All of the choices are correct.
Answer: E
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During a microarray analysis, cDNAs made from normal cells are stained with a green fluor and
cDNAs from abnormal cells are stained with a red fluor. Which of the following statements is true about the results of this experiment?
a. Red spots indicate genes that are underexpressed in abnormal cells. b. Red spots indicate genes that are not expressed in abnormal cells. c. Red spots indicate genes that are overexpressed in abnormal cells. d. Red spots indicate genes that are overexpressed in normal cells. e. Red spots indicate pseudogenes.
An ion is an atom that has _____
a. the same number of electrons and protons b. different numbers of electrons and protons
Type II survivorship curves ____
a. are characteristic of humans and elephants b. indicate a fairly constant rate of death at all ages c. indicate a high mortality rate in the very young d. are characteristic of species in which most individuals live a relatively long life and die of old age e. are typical of species with high biotic potentials
During the 1968 Olympic Games, the International Olympic Committee performed an analysis of ____ on all female
athletes in order to verify their sex. a. Barr bodies b. hormone levels c. karyotypes d. genitalia e. phenotypes