The answer to the question is d. tissues
Because the stomach is lined by a mucous membrane (the gastric mucosa)
13)C.
14)B.
16)A.
18)A.
19)C.
20)C.
21)D.
22)A.
23)D.
24)D.
HOPE THIS HELPS!!
<span>The right side of your heart receives blood from the body and pumps it to the lungs. The left side of the heart does the exact opposite: It receives blood from the lungs and pumps it out to the body. Blood that travels from the lungs to the body contains oxygen from the lungs. Blood that travels from the body to the right side of the heart contains CO2 which is breathed out when it gets to the lungs.</span>
Answer: The answer is A. Explains how organisms change in response to the environment.
Explanation: A scientific theory is an EXPLANATION of an aspect in the natural world. In other words, it just tells why something happens. Now it is not just a guess, it is well-supported by evidence and previous studies.
Now to knock out your other choices:
B. is wrong because:
A scientific theory does not predict. It can serve as a basis for a prediction, or what you call a hypothesis, but it does not predict an outcome.
C. is wrong because:
As mentioned earlier, a theory is WELL-SUPPORTED by evidence and previous research.
D. is wrong because:
A theory does not become a scientific law.
