__________ are used by crustaceans for detecting the pull of gravity
A. Antennal glands
B. Maxillae
C. Draglines
D. Statocysts
E. Swimmerets
D
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Transcription factors control which of the following phases of pattern formation in the human embryo?
A. formation of body axes and segmentation B. segmentation and development of segment characteristics C. segmentation, development of segment characteristics, and cell differentiation D. formation of body axes, segmentation, development of segment characteristics, and cell differentiation E. cell differentiation
The correct sequence of reagents in the Gram stain technique is
a. iodine, alcohol, safranin, crystal violet. b. safranin, crystal violet, alcohol, iodine. c. crystal violet, iodine, alcohol, safranin. d. crystal violet, alcohol, iodine, safranin. e. alcohol, iodine, crystal violet, safranin.
The carboxyl group can exist in an ionized form and also in a nonionized form
__________________Indicate whether the statement is true or false.
During Mendel's pea plants experiment, he discovered that the trait for tallness is dominant to that of shortness. Which of the following statements is correct?
A. Tall = TT or tt while short = Tt B. Tall = TT or Tt while short = tt C. Tall = tt while short = TT or Tt D. None of these statements are correct.