The movement of water across a membrane from an area of high to low water concentration is an
example of ____.
a. active transport
b. endocytosis
c. osmosis
d. both osmosis and active transport
e. both diffusion and osmosis
E
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Aquatic biomes are defined primarily by ________.
A. their salinity B. their temperature C. the dominant animals that live there D. the dominant plants that live there
An egg of the organism of S. mansoni is isolated from the feces of an adult man who has been traveling in Africa. An unoperculated egg with a large lateral spine is recovered. The patient is administered the standard dose of praziquantel; however, his infection does not improve. Which one of the following statements explains this discrepancy?
a. Metrifonate should have been adminis-tered. b. Bilarcil is the drug of choice for this type of infection. c. Steroids should have been initially admi-nistered. d. A larger dose may be required to be effec-tive against this organism.
The accompanying figure shows the history of large meteorite impacts on both the earth and the moon. What is the graph's major implication for the origin of life on Earth?
A) Huge impacts make it unlikely that life arose and survived on Earth before about 3.8 billion years ago. B) Meteorites could not have brought the organic molecules that were necessary for life appear. C) The moon is considerably older than the Earth. D) Life must have originated on a different body in the solar system and been brought to Earth. E) The Oparin-Haldane model of life's origins applies to the moon as well as to the Earth.
Antibiogram reports are useful for ALL of the following reasons EXCEPT to
a. monitor control of known pathogens. b. track the emergence of a new pathogen. c. identify antibiotic resistance. d. determine the pathogen's origin.