Please choose the correct statement comparing Bacillus cereus to Clostridium perfringens.
A) Both bacterial infections are mediated by ingested endospores
B) Similar foods can be the carrier material for the endospores of both organisms.
C) The symptoms of the two diseases are similar.
D) All of these choices are correct.
E) Both bacteria are gram-positive rods.
D) All of these choices are correct.
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Which of the following organisms would most likely produce asexually?
A. a fish in a tidal zone B. a haploid lizard C. a mammal D. a queen honeybee E. None of these organisms could produce asexually.
What type of relationship is occurring when one organism feeds on or in another species without immediately killing the host species?
a. predation b. herbivory c. parasitism d. commensalism
Which is a correct description of hormone action?
A. FSH stimulates Leydig cells in the testes. B. LH stimulates Sertoli cells in the testes. C. Testosterone stimulates corpus luteum. D. GnRH stimulates the anterior pituitary gland. E. Testosterone regulates LH and FSH in a positive feedback loop.
Transgenic organisms are used to clarify which gene may be responsible for a mutant phenotype because
A) individuals with a mutant phenotype can carry mutations in more than one gene. B) the genes that cause diseases are always dominant. C) the genes that cause diseases are always recessive. D) strains used to create transgenic organisms carry no mutations and all their genes are wild-type.