Index fossils (also known as guide
fossils, indicator fossils or zone
fossils) are fossils used to define
and identify geologic periods (or
faunal stages).
The term is normally applied to a group of between six and nine elements (boron, silicon, germanium, arsenic, antimony, tellurium, and possibly bismuth, polonium, astatine) found near the center of the P-block or main block of the periodic table.
Answer:
The three-way is a determiner.
Explanation: there is a 75% chance to get heads or tails, rather than 50% if it was tossed once or twice
Answer:
D) Beta galactosidase will not be produced.
Explanation:
Promoter is necessary to start the transcription of the structural gene. The position of promoter is important because the gene which is downstream to promoter will be transcribed and the gene upstream to the promoter will not be transcribed.
Lac operon has three structural gene lacZ, lacY, and lacA. Lac Z codes for β galactosidase, lac Z codes for permease and Lac A codes for transacetylase. So if promoter for the lac operon moves between the beta-galactosidase (lacz) gene and the permease (lacy) gene, then the beta-galactosidase gene will not be produced because it is places upstreamed to the promoter.
The accumulated cell Products that are never enclosed in a unit membrane is called inclusion
<h3>What are cell inclusions?</h3>
Cell inclusion is defined as those pigment or nutrients that are found within the cell which is different from the cell organelles in both structure and function.
Example of cell inclusions are:
Therefore, The accumulated cell Products that are never enclosed in a unit membrane is called inclusion.
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