selected time to a earlier population measurement. Variety of young produced by every feminine in a inhabitants in a given time period.
A set time frame to legally hunt a certain species. (seer-el) successional stage; an identifiable stage within the strategy of replacing one community of plants and animals with another. A tundra landform; a surface depression created when permafrost in waterfilled soil melts.
Knowledge developed over time by statement, regarding the natural world. The method by which water evaporates from crops. Snow or soil that has not been trampled or packed by the