At one time, most people believed that the universe was static, meaning it did not change. when larger and better telescopes were invented in the early 1900s, however, it was discovered that light from objects in space shifted toward longer wavelengths. scientists concluded that only an expanding universe could explain this shift. which of the following statements is supported by this example? a. the theory of the expanding universe cannot change, even if new evidence arises. b. scientific knowledge can change when new evidence or interpretations arise. c. the principle of the expanding universe is a scientific law. d. once a scientific theory has been accepted, it can never change.

The correct answer is option B, Scientific knowledge can change when new evidence or interpretations arise.

Explanation:

The logical explanation to any scientific theory/law keeps on changing. This is so because the first logical explanation to any scientific theory was the best possible explanation to it available at that time with the limited resources and was accepted by the majority of peers. But with the advancement in technology some new theories may come forward.  for example – Earlier it was found that atom in the smallest unit of matter , but with the advancement in high scale microscope it was found that even atom is made of smaller particles like electron, proton etc. Thus the scientific theories/laws  get affected by new researches.

from my research i have to the conclusion that decomposers, such as fungi, bacteria and invertebrates, play a critical role in nutrient cycling and without them the earth's ecosystem may not support life as we know it. elements such as carbon, nitrogen and phosphorus exist in limited amounts on earth, although huge amounts of carbon are being released into the atmosphere from underground sources now by humans. it is still extremely important that other nutrients be retained by the process of re-use. decomposers are organisms that are able to chemically break down dead material and make these elements available for use by other organisms. without this breakdown of dead material, dead bodies would pile up. so decomposers also play a role in clean up also. without them, life might not continue as we know it and dead material would overwhelm the earth.    

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