Sea urchins living in the rocky intertidal zone use the following method to overcome wave shock:
a. creating burrows in which they live.
b. having a low profile.
c. using spines to dissipate the energy of the wave.
d. all of the above
D
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Diglycerol tetraether lipids
A. tend to make the membrane less rigid. B. are found in some bacteria and some Archaea. C. form typical bilayer membranes in thermophilic Archaea of the genus Thermoplasma. D. are a characteristic feature of thermophilic Archaea.
Interferon synthesis
A) protects the synthesizing cell from viral attack. B) signals cells nearby to synthesize antiviral proteins. C) blocks viral attachment to nearby cells. D) degrades viral nucleic acids.
When considering nomenclature for scientific names, what is the difference between the two primates, Homo sapiens and Homo erectus?
A. They are animals of a different order. B. They are animals of a different kingdom. C. They are animals of a different genus. D. One is a primate but the other is not. E. They are animals of a different species.
Which of the following are primary lymphoid tissues?
A) thymus and lymph nodes B) lymph nodes and spleen C) spleen and mucosa-associated lymphoid tissue D) thymus and bone marrow E) bone marrow and mucosa-associated lymphatic lymphoid tissue