The "hematocrit" is a measure of the total volume of which blood constituent?
A. plasma
B. leukocytes
C. erythrocytes
D. platelets
E. None of the choices for this question are correct.
C. erythrocytes
Biology & Microbiology
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Which one of the following enabled plants to spread across the land?
A. the increase in atmospheric oxygen B. the co-evolution of fungi C. the presence of bulk transport systems D. the evolution of new photosynthetic pathways
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Which of the following is NOT a part of the lymphatic system?
A. Tonsils B. Spleen C. Lymph node D. Bone marrow E. Pancreas
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A ____ uses positive pressure breathing to ventilate its lungs
a. bird b. frog c. dog d. reptile e. human
Biology & Microbiology
In an evolutionary sense, what is meant by the term molecular clock?
What will be an ideal response?
Biology & Microbiology