First answer gets !

i have made an eco system and i have already chose the antibiotic and biotic factors but i need to decide how big the population needs to be of each biotic factor. how do i figure it out?
(i can give more info of u need it to me! )

in advance

Talking listening and reacting non verbally are all part of communicating

1. emigration the movement of people from one place to another 2. immigration a situation in which resources are being used up at a faster rate than they can be replenished 3. migration the leaving of one's homeland to settle in a new place 4. overpopulation the movement of people to a new country 5. sustainable development a situation in which the birth rate is not sufficient to replace the existing population 6. underpopulation the ability to meet current needs without reducing the ability to meet future needs 7. unsustainable development the increase in the population of a city 8. urbanization a situation in which the number of people exceeds the available natural resources in an area

What organs comprise the respiratory system of a bird