A different or alternate form of the same is gene is called and "allele". Sometimes they can cause different observable changes in the phenotypic traits. However, they normally cause little or no variation in traits.
<span>A scientist is determining the age of a rock by comparing their position to other rock layers. By doing this, the scientist is determining the relative age of the rock. </span>
Bacteria are found in every habitat on Earth: soil, rock, oceans and even arctic snow. Some live in or on other organisms including plants and animals including humans. There are approximately 10 times as many bacterial cells as human cells in the human body.
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Is this a true of false question? If so, then the answer would be false. Not all have a short life span.
