Answer:
D) found in a limited time span
Explanation:
Index fossils are the remains of living organisms for which we have already established relative age. These are fossils that only existed during a limited period of geologic time and are easily identified, found in large volumes, and found in many different locations around Earth. Due to these factors, index fossils may be used as a guide for comparison in determining the relative age of an unknown object.
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a plant cell has a cell wall, chloroplast, and vacuole where a animal cell doesn't.
Answer:
Geologic time spans are divided into units and subunits, the largest of which are eons. Eons are divided into eras, which are further divided into periods, epochs, and ages.
Explanation:
Are examples of quantitative trait / polygenic inheritance.
A quantitative trait is a phenotype that can be measured and depends on the
cumulative actions of many genes and the environment.
These traits are very variable among individuals, there is a range of phenotypes with continuous
distribution. For examples: height, weight, shoe size and skin color.
B: The birds in the two populations have different mating behaviors
