Answer:
Mammals first appeared
Explanation:
The dinosaurs became extinct one million years after the Cenozoic era started. The mammals first appeared as the modern culture first appeared in that era.
Answer: Carcinogens
Explanation:
Carcinoids refer to a specific type of slow growing tumor, tumors are the cancerous growths within a body, and sarcomas are tumors that occur in bones and soft tissues.
Answer: By us people breathing in oxygen and breathing out carbon dioxide.
Answer:
Sedimentary rocks are the product of 1) weathering of preexisting rocks, 2) transport of the weathering products, 3) deposition of the material, followed by 4) compaction, and 5) cementation of the sediment to form a rock.
Explanation:
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