For which of the following diseases or conditions should antibiotics be used?
A) AIDS (to combat HIV)
B) Mad cow disease
C) A common cold
D) Smallpox
E) Lyme disease
E
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Water is most dense and thus heaviest at 4?C. At 0?C, ice forms and the ice can float on liquid water. Suppose ice were more dense than water at 0?C. What would happen in a lake at this temperature?
A. The ice would cover the bottom of the aquatic system and would build up in layers over time. B. Ice would not form because solids are always less dense than liquids. C. The ice would cover the surface of the aquatic system and would never melt. D. The cold temperatures and the subsequent ice formation would prevent hydrogen bonds from forming between the water molecules, thus causing the existing ice crystals to become disassociated from each other.
The ultimate source(s) of energy, on which all living organisms depend, is(are) __________
a. the sun b. autotrophs c. primary producers d. the first trophic level
List several functions of epithelial tissues
What will be an ideal response?
Sahelanthropus tchadensis
A) the "hobbit people"