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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A ____ uses positive pressure breathing to ventilate its lungs

a. bird b. frog c. dog d. reptile e. human

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In an evolutionary sense, what is meant by the term molecular clock?

What will be an ideal response?

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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

Biology & Microbiology