The toxin of botulism is classified as a(n)
A. enterotoxin.
B. endotoxin.
C. neurotoxin.
D. toxoid.
C. neurotoxin.
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In an energy pyramid, which of the following
represents the base, the largest part of the pyramid?
a. primary producers b. detritivores c. decomposers d. herbivores e. carnivores
Seventy to 90 percent of the genetic material in a gamete made in your body could be inherited from your mother. How could this be?
a. The above statement is incorrect. Fifty percent of the genetic material in your gametes comes from your father. b. You receive maternal genes through the placenta and through breast milk. c. The X chromosome is substantially larger than the Y chromosome. d. Your maternal genes kill off your paternal genes at a greater rate than your paternal genes kill off your maternal genes. e. You receive many mitochondria, which have their own genome, from your mother, but not from your father.
The most serious form of pelvic inflammatory disease (PID) causes
a) septicemia. b) salpingitis. c) toxemia. d) pyelonephritis.
The repair of a stalled replication fork may be initiated because its structure resembles
a. a Holliday junction. b. a pyrimidine dimer. c. a transcription bubble. d. a base-pair mismatch. e. viral DNA.