As an erythroblast develops into an erythrocyte, it
A) becomes filled with clotting proteins.
B) begins to manufacture platelets.
C) loses its ability to reproduce.
D) takes on the characteristics of an immature monocyte.
E) undergoes active aerobic metabolism.
C
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Why is it unethical to use humans in experimental genetics? Explain your reasoning
What will be an ideal response?
A specimen from a patient suffering diarrhea shows a one-celled organism in the microscope. The organism moves very slowly by protruding its cytoplasm. You would predict that the patient has an infection caused by ________.
A. Toxoplasma B. Entamoeba C. Plasmodium D. Trichomonas E. Giardia
The control of the temperature of the body is an example of which of the following?
a. homeostatic mechanism b. positive feedback system c. endocrine function d. negative feedback system e. both homeostatic and negative feedback systems
What is the function of the 3' poly-A sequence in eukaryotic mRNA?
a. It provides an intron splicing signal. b. It provides protection from cytosolic enzymes. c . It helps with translation termination. d. It is the initial attachment site for ribosomes.