There are normally one or two cases of measles per month in a particular city. However, in the month of September, there were 15 cases. Is this an epidemic?
A. Yes
B. No
Answer: A
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The beads-on-a-string form of DNA condenses into a compact fiber called the 30 nm filament. Which of the following is true about its formation?
A. Histone H1 is essential for formation of the 30 nm filament. B. The histone tails of the octamer histones are absolutely required for filament formation. C. The zigzag model describes how the nucleosome array adopts a spiral shape when forming the filament. D. The 30 nm filament is also called a tetranucleosome. E. The linker histone is essential for formation of the 30 nm filament.
What is the structure aerenchyme in sea grass equivalent to in brown algae?
a. Gas bladder b. Thallus c. Holdfast d. Blade
In the case of ________, ONLY the neurotoxin is required to cause food poisoning. So, antibiotics will NOT help cure the disease, and destroying the cells in food processing will NOT prevent disease if the neurotoxin is already formed
a. botulism b. campylobacterosis c. dysentery d. salmonellosis
The term angiosperm refers to
A. the presence of pollen. B. the narrow sperm of angiosperms. C. the presence of endosperm. D. the branching of vascular veins. E. the enclosure of the seed within a fruit.