Question

which of the following is not a significant challenge in the field of taxonomy? there are millions of species on earth to classify. new species are constantly being discovered. scientists do not always agree on how to classify living things. the type of system scientists use to classify living things is constantly changing.

Explanation:

• For option A: With millions of species, classifying them all is a huge challenge in taxonomy.
• For option B: New species being discovered means continuous work to classify them, a significant challenge.
• For option C: Disagreements among scientists on classification methods create challenges.
• For option D: The classification system evolving is a normal part of scientific progress and not a "challenge" in the sense of hindering taxonomy; it's an improvement process. So this is not a significant challenge.

Answer:

D. The type of system scientists use to classify living things is constantly changing.