Because archaeons lack peptidoglycan in their cell walls ________.
A. some have an outer layer of complex polysaccharide and some have an outer layer of protein
B. some have an outer layer of complex polysaccharide
C. some have an outer layer of protein
D. they must always be grown in isotonic medium
Answer: A
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Tsunamis are usually:
a. deep-water waves. b. shallow-water waves. c. wind waves. d. capillary waves. e. the result of winter storms.
When the first example of a duckbilled platypus was presented for identification, the scientists that received the specimen tried to remove all of its pieces and parts to prove it had been contrived. Indeed, it is an odd creature seemingly made up of spare parts from various classes of animals. The bill of the platypus is not related to the bill of a duck though they seem so similar and evolved to solve a similar environmental pressure (accessing food while in the water). What do we call structures like these bills?
a. homologous b. vestigial c. analogous d. phylogenetic
All of the populations of different species that occupy and are adapted to a given area are referred to
by which term? a. biosphere b. community c. ecosystem d. niche e. habitat
Which type of infection can be caused by septicemia?
a. Bacteremia b. Focal infection c. Local infection d. Viremia e. Systemic infection