PLS GELP!!! ITS 30 POINTS!!!
What happens after old blood, which has already circulated
through the body, moves into the heart?

Look at the following answer choices and determine which belongs in the both category. testable, can be disproven explains natural phenomena, has evidence to support it prediction, tentative, one or more scientists working together well established, many different scientists working independently, highly reliable

How does the author's purpose in this passage differ from an author writing about her personal struggle living with asthma?

When a human or animal consumes food, the carbon in that food is most likely to be converted into which of the following elements? a. carbon remains carbon b. nitrogen c. oxygen d. hydrogen