Which feature is not characteristic of all living organisms?
A. All have requirements for energy.
B. All must participate in one or more nutrient cycles.
C. All have ultimate dependence upon the sun.
D. All interact with other forms of life.
E. All must reproduce inside of organisms of other species.
Answer: E
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Protozoan cysts are
A. necessary for transmission to a new host. B. part of all protozoan life cycles. C. the primary form of replication. D. analogous to bacterial endospores. E. are produced by binary fission.
Extracellular matrix is made up of
a. polysaccharides and fibrous proteins. b. fibrous proteins and lipopolysaccharides. c. polysaccharides and lipopolysaccharides. d. fibrous proteins and complex lipids. e. polysaccharides and complex lipids
Genes for regulatory elements, such as creb, were found to be important in animal learning. Which of the following would increase the probability that such an element is studied throughout the animal kingdom?
A) its unique sequence in Drosophila B) the finding that creb is highly conserved C) the number of repeats of the creb gene D) the interaction of creb with cAMP E) the finding that creb activates odor perception
Molecular chaperones mediate the folding of other protein molecules
__________________ Indicate whether the statement is true or false.