Which is not a factor in a fossil organism being useful as an index fossil? it must have lived through a long span of time. it must be widespread geographically. it must be abundant. it must be limited to a short span of geologic time.

Option (1)

Explanation: Index fossil are those fossils that appears for a very short period of time in the geological time scale and has a wide geographical distribution. For example, Ammonites.

Index fossils are a good source for rock age determination and also it helps in the correlation of rocks.

Thus, the correct answer is option (1).

as a general rule, scissors have blades less than 6 in (15 cm) long and usually have handles with finger holes of the same size. shears have blades scissors used to cut hair or fabric must be much sharper

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