Which of the following is not true of influenza?
A. H5N1 is the bird flu strain that may cause a pandemic.
B. Influenza B viruses undergo both antigenic drift and antigenic shift.
C. Antigenic drift changes the antigens to reduce immune recognition.
D. Antigenic shift causes changes in the RNA strands.
E. Influenza has glycoprotein spikes of hemagglutinin (H) and neuraminidase (N).
Answer: B
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Organisms with a circulating body fluid that is distinct from the fluid that directly surrounds the body's cells are likely to have _____
A) an open circulatory system B) a closed circulatory system C) a gastrovascular cavity D) branched tracheae E) hemolymph
The scientific name of an organism is composed of two names. The first part identifies the ____ while the second part
designates the ____.
a. family; genus b. genera; genus c. genus; species d. species; genus e. phylum; species
Which of the following is not a way in which humans depart from apes?
A. S-shaped spine B. walking on two legs C. spinal cord exits at the bottom of the skull D. None of the choices are correct.
The three parts of a homeostatic mechanism are ________, ________, and ________
Fill in the blank(s) with correct word