Environmental Science
The species of plants that play a vital role in controlling the relative abundance of other species in a community are called

Edge species
Successional species
Keystone species
Pioneer species
Link species

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Environmental Science
When a liquid thermometer is held in direct sunlight,

It will accurately measure the air temperature
It will measure a much lower temperature than that of the air
It will measure a much higher temperature than that of the air
It will measure the temperature of the sun rather than the air

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