SCIENCE
EARTH SCIENCE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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lived for short period of time
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found only in one spot on Earth
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geographically widespread
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None of the above
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Detailed explanation-1: -Therefore, the answer will be option D) ‘exist on Earth for a long period of time ‘ will be the correct answer.
Detailed explanation-2: -A useful index fossil must be distinctive or easily recognizable, abundant, and have a wide geographic distribution and a short range through time.
Detailed explanation-3: -Three characteristics of a good index fossil are: The fossil is commonly known and recognizable. The fossil is found in a wide range of locations. The plant or animal didn’t live for a relatively large period of time.
Detailed explanation-4: -(Most index fossils are marine organisms, because ocean currents allowed them to populate over a large area.) 4. The organism only lived for a short period of time. This means it will only be found in a few rock layers.
Detailed explanation-5: -To be classified as an index fossil, the fossil must be unique. Since the gastropod is not unique, it cannot be an index fossil. An index fossil must be found over a wide area of the Earth. Since the gastropod is widely spread, it cannot be an index fossil.