Adrainage basin is a
1. stream that flows into a lake or into a larger stream

2. network formed by streams and rivers that flow together

3. feature common in youthful river channels

4. region that collects streams (surface runoff) that then become part of a body of water, such as a lake or a river

The is an estimate of the fewest number of organisms a population needs to avoid extinction. this measurement will most if the number of offspring each female in the population produces increases. if the population's this measurement will most likely increase. 1 population density, minimum viable population, carrying capacity 2 decrease, be unaffected, increase 3 death rate increase, dead rate decrease