Nearsightedness and farsightedness are caused by the
A) density of the aqueous and vitreous humor.
B) length of the eyeball.
C) shape of the cornea.
D) shape of the lens.
E) positioning of the rods and cones.
B
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Cystic fibrosis (CF) is an autosomal recessive disorder caused by faulty chloride ion channels in cells lining of the lungs and the pancreas. A man and woman, with no CF symptoms, have an unaffected boy and a daughter with CF. The gene responsible for CF is located on:
a. The X-chromosome b. The Y-chromosome c. One of the human chromosomes 1=12
Which of the following vitamins is not stored in fat?
a. A b. K c. C d. D e. E
Which type of organism is most likely to be a producer?
a. fungi b. protist c. bacteria d. plants e. animals
Which of the following types of plasmids allows a bacterial cell to kill its competitors?
A) virulence plasmids B) fertility plasmids C) bacteriocin plasmids D) resistance plasmids E) cryptic plasmids