Q: In gas exchange, oxygen flows into the blood, and what flows out? Choices: - naturally dioxide - carbon monoxide - liquid dioxide - carbon dioxide A:
carbon dioxide

(Question)
Q: The kidneys are a pair of bean-shaped structures that are located just below and posterior to the liver in this? Choices: - stomach cavity - cerebral cavity - mantle cavity - peritoneal cavity A:
(Answer)
peritoneal cavity

Ques: Q: What structure shows the bonding between atoms, with dots representing available electrons? Choices: - Mendelian model - Pascal model - string theory - lewis structure A:
Ans: lewis structure

(Q).
Q: What has increased in the atmosphere throughout the history of the earth? Choices: - nitrogen - wind - carbon - oxygen A:
(A).
oxygen

Ques:Q: Found in cord blood and other sources, what kind of cells hold the promise of renewing and repairing body tissues? Choices: - red blood cells - white blood cells - neurons - stem cells A:

Ans:stem cells

Question: Q: Rounded grains indicate that the minerals eroded from what? Choices: - iron - fossils - recent rock - earlier rock A:
Answer:
earlier rock