1. When do pioneer species arrive during primary succession? A. Last ones to appear in an ecosystem with no soil present
B. First ones to appear in an ecosystem with no soil present
C. Appear in an ecosystem during the middle of primary succession
D. Appear in an ecosystem during the middle of secondary succession

in addition to spreading humanist ideas, erasmus has contributed to criticism of corruption in the church.

sheep is a herbivore animal whereas grasshopper belongs to the class chordates but both of them feed on greens.  

if grasshopper and sheep feeding on a pasture land, i do not think both of them will have any impact on each other. however, the number of the species can make difference. since sheep feed on greens, there is a possibility there left no pasture land for the grasshoppers or they may get extinct.

thinking it would be physical characteristics

ask your friends for what they got then copy it down if you don't have any friends which is fine than google it or pay the teacher