A young boy has DMD. What do you know about his parents?

a. Both of his parents are carriers of DMD.
b. At least one of his parents is a carrier of DMD.
c. His mother is a carrier of DMD.
d. His father is a carrier of DMD.


C

Biology & Microbiology

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If the right optic nerve were cut, what would still remain?

a. the inner portion of the left visual field and the outer portion of the right visual field b. the outer portion of the right visual field and the inner portion of the left visual field c. the inner portion of the right visual field and the inner portion of the left visual field d. the inner portion of the right visual field and the outer portion of the left visual field e. the entire right visual field

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The most primitive vertebrates are members of the group of:

a. jawless fishes b. amphibians c. cartilaginous fish d. birds e. bony fish

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What can result in speciation within a few generations?

a. development of a physical barrier b. polyploidy arising in a plant species c. postzygotic isolating mechanisms d. change in environmental conditions e. the introduction of a new predator into an area

Biology & Microbiology

Potable water must be ________.

A. free of all elements B. free of pathogens C. sterile D. absolutely clear

Biology & Microbiology