All set-point systems have three components: a set-point mechanism, a detector mechanism, and ________ mechanism.
(a) a translating
(b) an effector
(c) a stablizing
(d) a negative feedback
(b) an effector
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Opportunists or opportunistic pathogens
A. are usually saprophytes. B. take advantage of special circumstances. C. are usually mutualistic. D. always cause disease.
Suppose that a given gene undergoes a mutation to a dominant allele such that 2 out of 100,000 offspring exhibit the new mutant phenotype. Assuming that these offspring are heterozygous, what is the mutation rate for the gene?
What will be an ideal response?
Which of the following explains why fungi are such efficient decomposers, allowing them to undergo rapid and extensive growth?
a. Fungi use the mechanisms used by most parasitic organisms for rapid growth. b. Because fungal hyphae is only one cell thick, fungi present an enormous surface area for enzyme secretion and nutrient absorption. c. Fungi do not ingest food. d. Fungi are adapted to a wide variety of environmental influences, such as temperature and pH.
Robert Koch sought a "magic bullet" for the treatment of disease caused by bacteria
Indicate whether the statement is true or false