Answer:
they contain hymoglobin
Explanation:
the red pigment in blood cells
Buenos Aires is the capital of argentina
Answer:
C
Explanation:
it is chemical, not physical
Answer:
pioneer species
Explanation:
Primary succession begins in barren areas, such as on bare rock exposed by a retreating glacier. The first inhabitants are lichens or plants—those that can survive in such an environment. Over hundreds of years these “pioneer species” convert the rock into soil that can support plants.
