Lipid A is a component of
A. lipopolysaccharides.
B. plant cell walls.
C. cytoplasmic membranes.
D. mycolic acid.
E. bacterial glycocalyces.
Answer: A
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Paedomorphosis is
A. the formation of limbs from fins in the evolution of land vertebrates. B. the change from radial to bilateral symmetry in the evolution of plants and animals. C. the retention of juvenile traits in an adult organism. D. an earlier development of adult traits in an organism. E. the development of different types of eyes from a simpler form.
A keystone species has a greater effect on community structure than its numbers might suggest
Indicate whether the statement is true or false.
Solenopsis invicta, a species of fire ant, was introduced to the United States from ____
a. South America b. Canada c. Asia d. Africa e. Europe
Which of the following is an example of macroevolution?
A. the origin of horses and donkeys from a common ancestor B. giraffes with longer necks reaching higher tree branches C. antibiotic resistance in S. aureus D. female cardinals preferring males with bright red feathers E. the beaks of cactus finches changing in size in response to a drought on the Galapagos islands