Cattle and termites both have symbiotic microorganisms living in their digestive tracts that help them by
A) digesting cellulose.
B) producing oxygen.
C) producing large organic molecules.
D) releasing large amounts of heat.
A
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Which of the following explains how fog is a problem to aviation?
A. visibility drops B. visibility increases C. temperature increases D. temperature decreases
The tendency of the soils to form clumps of soil particles or lumps is referred to as the soil
A. chemistry. B. texture. C. structure. D. fertility.
A ________ stream pattern develops on lands underlain by tilted or folded, alternating hard and soft, sedimentary strata.
A) trellis B) boreal C) radial D) dendritic
An LD50 is a dose of a toxic chemical that
A. Is an acceptable level of risk for most individuals B. Is 50 times less than the minimal dose C. Kills half of the population D. Kills individuals 50 years old and above E. All individuals react to