Explanation:
<em>The disadvantage of a closed circulatory system is that with the blood always contained in vessels, it's under higher pressure. This means it can flow faster, which is necessary for supporting the metabolic rate of more complex animals such as vertebrates. Open circulatory systems are low-pressure systems that cannot meet the needs of a fast metabolism</em>.
The statement which is true is as follows:
- As evidence changes, scientific theories can also change.
Thus, the correct option is A.
<h3>What is Scientific theory?</h3>
A Scientific theory may be characterized as a well-determined description of some features of the natural world, based on a body of certainty that has been repeatedly assured through observation and experiment.
Scientific theories describe the natural world, while scientific law explains natural phenomena. It is not assumed that if a single study or inference is wrong, a scientific theory can be invalidated. It undergoes a series of protocols before rejection.
As evidence is modified or changed, the scientific theories can also be altered on the basis of it.
Therefore, the correct option for is question is A.
To learn more about Scientific theories, refer to the link:
brainly.com/question/26665644
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Answer:
Without Earth's magnetic field, solar winds — streams of electrically charged particles that flow from the sun — would strip away the planet's atmosphere and oceans. As such, Earth's magnetic field helped to make life on the planet possible, researchers have said.
Explanation:
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