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

Which best compares habitat and niche? o niche is a place in which organisms live, and habitat is the way in which an organism fits into its habitat.o habitat is a place in which organisms live, and niche is the way in which an organism fits into its habitat.habitat is a group of organisms that live in an area, and niche is a specific species that lives in that areao niche is a group of organisms that live in an area, and habitat is a specific species that lives in that area.

The first amino acid of a new polypeptide chain is

Can create a hboth of these instruments can measure wind speed. doppler radar and psychrometer anemometer and hygrometer doppler radar and anemometer radiosonde and psychrometer