One disadvantage of a simulation model of an ecosystem is that it
a. does not take into effect interactions between organisms.
b. does not take into effect nutrient availability.
c. does not take into effect water availability.
d. may not be accurate.
e. may predict disastrous consequences.
D
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Why would someone need to have an artificial pacemaker installed in his or her heart tissue?
A) The heart valves are not directing blood flow through the chambers properly. B) The SA node is not functioning properly to generate action potential at the proper intervals. C) The Purkinje fibers are not distributing the signal properly. D) The AV node is not sending signals to the ventricles.
Genetic methods of detecting microorganisms reveal that the number of bacterial species in nature exceeds previous estimates by several orders of magnitude. In human mouths, for example, it is estimated that 500-700 microbial species are normally present. Explain why previous estimates were low
What will be an ideal response?
Briefly describe the mechanism by which an internal stop-transfer sequence in a protein causes the protein to become embedded in the lipid bilayer as a transmembrane protein with a single membrane-spanning region
Assume that the protein has an N-terminal signal sequence and just one internal hydrophobic stop-transfer sequence.
Territorial behavior includes some form of advertisement, threat, and combat
Indicate whether the statement is true or false