Answer:
Lichens are often the first organism to colonize a new surface such as bare rock.
Many organisms require soil before they can colonize an area. Lichens that colonize bare rock secrete acids that break down the rock and start the soil-production process. Also, as lichens die, they provide some organic matter that also contributes to soil.
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a lack of resources cause organisms to fight for the resources and some organisms use said resources to obtain what they need to survive such as how predators act around a water hole.
OIt summarized the process of evolution.
Answer:
A.
Explanation:
A. Gas exchange happens through diffusion.
Answer:
The model appears to show the carbon dioxide molecules entering the blood cell and the oxygen molecules existing the cell.
