Which one of the following diseases is caused by a prion?
a) Rabies
b) Creutzfeldt-Jakob disease
c) Polio
d) Wound botulism
Answer: b) Creutzfeldt-Jakob disease
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A birth defect in which the spinal cord protrudes out of the vertebral column at birth is called ________
a. anencephaly b. fetal alcohol syndrome (FAS) c. spina bifida d. cleft palate
Which of the following would be an example of an r-selected species?
a. cheetahs b. elephants c. jellyfish d. primates
An erection of the penis results most directly from:a
the bone present in the penis. b. dilation of the veins leading from the penis. c. contraction of the muscles within the penis. d. dilation of the arteries in the penis. e. a blocking of enzymes within the penis.
Griffith's experiments with S. pneumoniae were significant because they showed that traits could be transferred from one organism to another. What else did he find that was significant?
a) The transferred traits were heritable b) DNA was the genetic material c) A virus made the bacteria pathogenic d) Protein could not be the genetic material e) Heat kills bacteria