Are there any parts of the human body that get oxygen directly from the air and not from the blood?

What would happen to the nutrients in an ecosystem if decomposers, such as bacteria, didn’t exist there?

In one or two well-crafted paragraphs in your laboratory journal, summarize the process in which normal cells become cancer cells. your paragraph(s) must include each of the terms listed below. underline each term in your writing:

Rarefaction is used for which of the following? a. creating a representative sample b. studying how disease impacts populations c. rediscovering species thought to be instinct d. determining which sea creatures live in an area