A virus differs from other pathogens in that it is
A) multicellular.
B) larger.
C) more dangerous.
D) not capable of reproduction outside a living cell.
D
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Which of the following is the second step in the process of fertilization?
A. The sperm nucleus enters the egg, and the egg immediately prevents any further sperm from gaining access by forming a fertilization membrane that a sperm cannot penetrate. B. A sperm fuses with the egg's plasma membrane. C. The capacitated sperm release their acrosomal enzymes to penetrate through the cells surrounding the egg. D. The nuclei of the sperm and egg rupture within the fertilized egg and the chromosomes mix to form a single nucleus.
What is the main, general purpose of negative feedback?
A) to control all body system tissues B) to maintain homeostasis C) to keep the body's sugar high D) to regulate excretion
All of the following are types of leukocytes EXCEPT ________
A) erythrocytes B) monocytes C) lymphocytes D) neutrophils
The hyoid bone is unique because it ________
A) is the only bone of the body that does not directly articulate with any other bone B) is an irregular bone C) belongs to both the axial and appendicular skeletons D) has no specific function E) largely consists of cartilage