Which of the following structures of the eye is matched appropriately with its developmental material?
a. cornea ? ectoderm
b. cornea ? crystallin
c. lens ? optic cup
d. retina ? crystallin
e. retina ? ectoderm
A
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The ethanol shock or heat shock test will separate which two bacteria?
a. C. perfringens and Clostridium ramosum b. Clostridium and Bifidobacterium c. Actinomyces and Bifidobacterium d. Eubacterium and Eggerthella
In humans, a gene that has been identified as causing a type of skin cancer is the
a. mutant superman. b. sonic hedgehog. c. superhero aardvark. d. superwoman echidna. e. mutant mole rat.
What is the age structure diagram for a population that has a birthrate higher than its death rate and larger population in prereproductive ages than in reproductive and postreproductive ages?
A. This population can expect to see a pyramid-shaped diagram that will cause the population to grow in the near future. B. This population can expect to see a pyramid-shaped diagram that will cause the population to decrease in the future. C. This population can expect to see a bell-shaped diagram that will cause the population to grow in the future. D. This population can expect to move into a logistic growth curve in the near future. E. This population can expect to see an urn-shaped diagram that will cause the population to grow in the future.
The most effective control of mosquito-borne disease is
A) treatment of infected humans. B) treatment of infected wild animals. C) elimination of the mosquito population. D) avoidance of endemic areas. E) treatment of uninfected humans.