Which part of the hemoglobin molecule directly interacts with oxygen?
a. globin
b. the sodium ion
c. the porphyrin
d. the iron ion
Answer: d. the iron ion
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Agatha's blastocyst implanted on December 5th. She is trying to figure out which date fertilization most likely occurred on. Which is the most likely date of fertilization?
A. December 5th B. December 1st C. November 25th D. November 5th E. December 4th
Which of the panels in the figure shows a movement called lateral flexion?
a) B b) F c) G d) D e) C
When water mixtures are formed, the components are chemically altered and the new molecular bonds can be separated only by chemical means.
Answer the following statement true (T) or false (F)
When blood is centrifuged and its components separate, the bottom of the tube holds the
A. plasma. B. platelets. C. erythrocytes. D. monocytes. E. buffy coat. F. electrolytes and waste products.