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

"d.) carbon dioxide and hydrogen sulfide"

the alkaline earth metals (beryllium (be), magnesium (mg), calcium (ca), strontium (sr), barium (ba), and radium (ra)) are a group of chemical elements in the s-block of the periodic table with very similar properties: shiny. silvery-white. hopefully this ? i didn't fully understand the question