Environmental Science
The lag in daily temperature refers to the time lag between the:

Minimum and maximum solar energy received at the surface for a given day
Time of maximum solar radiation and the time of maximum temperature
Minimum and maximum temperature for a day
Time of minimum temperature and the time of maximum solar radiation
Sunrise and sunset

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Environmental Science
What is meant by ex-situ conservation?

Conservation of a species outside its natural habitat
Conservation of plants
Conservation of forest eco system
Conservation of a species by protecting its habitat along with all other species living there

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