Which eye disease is characterized by a pannus forming over the cornea?
A. Keratitis
B. River blindness
C. Trachoma
D. Simple conjunctivitis
E. Stye
Answer: C
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How do smoking and alcohol consumption affect cancer risk?
A) Smoking combined with alcohol consumption results in greater cancer risk. B) Drinking alcohol results in greater cancer risk than smoking. C) Smoking or drinking alcohol result in similar cancer risk. D) Smoking results in twice the cancer risk of drinking.
Elements differ from each other in their
a. physical properties only. b. atomic number only. c. type of subatomic particles. d. physical properties and atomic number. e. type of electrons.
Which of the following statements regarding an inactivated vaccine is FALSE?
A) It can be produced with deactivated whole microorganisms. B) It can be produced from antigenic fragments of a pathogen. C) It is safer than an attenuated vaccine. D) It is made from mutated forms of the pathogen. E) It is made from pathogens that cannot replicate.
Amino acid and vitamin supplements are prepared from extracts of microbial cultures.
Answer the following statement true (T) or false (F)