Which of the following functions are performed by secondary messengers?
A) amplification of a message
B) transmission of a message one cell to another
C) both a and b
D) neither a nor b
A
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Based on all possible combinations V, J, D and constant regions, approximately how many antibody combinations are theoretically possible?
A) approximately 10,000 B) approximately 1,000,000 C) more than 2 million D) more than 1 billion
The aurora usually occur more frequently above Maine than above Washington State
a. True b. False
Satellite data confirm that Earth's "skin" temperature on land and water is ________
A) close to 0K B) unchanging over time C) close to 0°C D) almost the same everywhere E) capable of showing El Niño
"Paper parks" are frequently found in the developing world. Which of the following are characteristic of these?
A. They are designed for ecotourism, rather than conservation or sustainability B. They are managed to extract wood for pulp and paper production C. There is little in the way of infrastructure or enforcement of rules D. They are managed for hunting and collection of resources