ANIMAL BEHAVIOR
SOCIAL BEHAVIOR
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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I only
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II only
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I and II only
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II and III only
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Detailed explanation-1: -A good index fossil is one with four characteristics: it is distinctive, widespread, abundant, and limited in geologic time. Because most fossil-bearing rocks formed in the ocean, the major index fossils are marine organisms.
Detailed explanation-2: -index fossil, any animal or plant preserved in the rock record of the Earth that is characteristic of a particular span of geologic time or environment. 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: -Fossils are made from once-living organisms. Fossils are made of rock that replaced the body of the organism or filled in an impression left by the organism. Fossils are typically made from sedimentary rock rather than igneous or metamorphic rock.
Detailed explanation-4: -There are some types of index fossils which include Ammonites, Brachiopods, Graptolites, Nanofossils and Trilobites.
Detailed explanation-5: -Index fossils are of organisms that lived over a wide area. They lived for a fairly short period of time.