Not all members of a species are the same. every species like eye color, are passed from parent to offspring.

Variations, traits.

Explanation:

A small amount of the DNA is different for every member in the species. These differences brings out the variations in the genome. The traits are the characters, which are coded by the genes. These traits can vary from person to person depending on the genomic sequence. The traits are passed from one generation to anther. The recombination during the formation of gametes is the main reason behind variation.

Hence, the blank can be filled as follows:

Not all members of a species are the same. Every species exhibits variations. Traits, like eye color, are passed from parent to offspring.

1. law of superposition: when there are horizontal layers of rock. the layers at the top are the youngest.

2. law of uncomformity: where one layer is much younger than the previous one, therefore creating a gap in the time record.

3. inclusion: when there is a solid stone inside of another.

4. intrusion: a feature formed when a stone is filled with magma.

hope i answered your question.