Which aspect(s) of chromosome behavior is/are primarily responsible for the tremendous amount of genetic variability associated with sexual reproduction?
A) segregation of sister chromatids at anaphase II of meiosis
B) segregation of homologous chromosomes at anaphase I of meiosis
C) crossing-over between homologous chromosomes during prophase I of meiosis
D) independent alignment of different homologous pairs on the metaphase I spindle
E) both crossing-over between homologous chromosomes during prophase I of meiosis and independent alignment of different homologous pairs on the metaphase I spindle
E) both crossing-over between homologous chromosomes during prophase I of meiosis and independent alignment of different homologous pairs on the metaphase I spindle
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The amount of Oxygen in the blood carried by hemoglobin in the red blood cell is 2%.
a. true b. false
How are fats, phospholipids, and steroids alike?
A. They do not dissolve in water. B. They all contain at least one carbon ring. C. They are all solid at room temperature. D. They each contain only one fatty acid. E. They each contain a polar phosphate group.
In the figure above, which number identifies the tympanic membrane?
a. 4 b. 5 c. 6 d. 8 e. 10
Anti-virals for the influenza virus administered within the first 24-48 hours of the onset of illness can decrease the duration of the flu by at least 3 days. ?
Indicate whether the statement is true or false