Environmental Science
Which of the following statements regarding species interdependence are true? A. An association of two species where one is benefitted and other remains unaffected called mutualism B. An interspecific association where both partners derive benefit from each other is called commensalism C. A direct food relation between two species of animals in which one animals kills and feed on another is referred as predation D. A relationship between two species of organism where both the partners are benefitted from each other is called symbiosis

C and D only
A and B only
B and C only
A and C only
B and D only

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Environmental Science
Suppose yesterday morning you noticed ice crystals (frost) on the grass, yet the minimum temperature reported in the newspaper was only 35o F. The most likely reason for this apparent discrepancy is that:

The thermometer was read before the minimum temperature was reached for that day
The thermometer was read incorrectly
Temperature readings are taken in instrument shelters more than 5 feet above the ground
The thermometer was in error
The newspaper reported the wrong temperature

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Environmental Science
During the winter solstice in the Northern Hemisphere:

At middle latitudes in the Northern Hemisphere, this marks the longest night of the year
The noon sun is overhead at 23.5o S latitude
Astronomical winter begins in the Northern Hemisphere
All of these

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