Answer: b
Explanation:
An open system is when nutrients and waste are moved through the body freely through the body cavity, rather than being enclosed in veins.
6 is true - scientists with a strong belief in what they are working on may show bias
7 is false - most plants and animals reproduce sexually
Answer:
D - Other scientists can validate or disprove the findings
Explanation:
Publishing findings of their research projects is important as it enables peer-revision on their journals. The work can then be evaluated by the community at-large to validate or disprove it, which opens the dialogue with associate researchers.
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