Each round of meiosis 1 and 2 decrease the number of chromosomes found in a cell
a. true
b. false
Answer: b. false
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The overall process by which information carried by a signaling molecule is translated into changes that occur inside the cell is called signal ____.
a. digestion b. digression c. induction d. interaction e. transduction
Some photosynthetic bacteria produce gas vacuoles that regulate their buoyancy but contain no lipid.
Answer the following statement true (T) or false (F)
Which of the following describes the purpose of the polymerase chain reaction?
a. increasing the number of copies of DNA b. separating charged molecules by size and charge c. opening cells to extract DNA in a gelatinous mass d. cutting DNA sequences in a predictable manner
During inhalation, the ____
a. external intercostal muscles relax b. pressure in the lungs is less than atmospheric pressure c. diaphragm moves upward and becomes more curved d. chest cavity volume decreases e. lung pressure increases