Which of the following are features that make Bacillus anthracis a potential bioterrorism weapon?
A. Vaccination is not widespread in the United States.
B. Pulmonary anthrax is rapidly fatal.
C. It forms endospores that can be stored in powder form indefinitely.
D. It is naturally occurring worldwide in soil, and intentional release may not be suspected.
E. All of these choices are correct.
Answer: E
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Epigenetic inheritance may occur at which of the following stages?
A. Oogenesis B. Spermatogenesis C. Embryogenesis D. All of the answers are correct
It is accurate to say that neural transmission across nearly all mammalian synaptic clefts is the result of
A. the calcium within the axons and dendrites of nerves adjacent to a synapse acting as the neurotransmitter. B. neural impulses traveling across the cleft in both directions. C. neural impulses causing the release of chemicals that diffuse across the cleft. D. neural impulses traveling across the gap as electrical currents. E. neural impulses involving the flow of K+ and Na+ across the cleft.
The blastocyst attaches to the ________ about 6 days after fertilization and begins to digest its way inward
Fill in the blank(s) with correct word
Which of the following statements is NOT correct about the arrangement of tissues in the eudicot root?
A. The star-shaped phloem is located in the center of the vascular cylinder, with xylem arranged between the arms of phloem. B. The pericycle is the outer layer of cells in the vascular cylinder, with the ability to form secondary or branch roots. C. The epidermis of the root has no cuticle on its outer surface, unlike other epidermal tissues. D. The Casparian strip is a waxy lining on four sides of the cells of the endodermis, which forces water into the endodermal cells. E. The specialized root tissues are seen at the zone of maturation.