Which of these is evidence that eukaryotic genes are regulated independently instead of in units like operons? Genes use a common promoter and a common set of transcription factors.

Each gene has its own promoter, but they use a common set of transcription factors.

Each gene has its own promoters and set of transcription factors.

Genes use a common promoter, but each has its own set of transcription factors.

thats not a question

1. the geologists have established a set of principals that can can be used o determine the relative ages of rock. this principal is applied to sedimentary and volcanic rocks. the rocks exposed to wall of grand canyon has layers and by studying the number of horizontal layers in the rock(strata) the relative age can be determined. the layer first formed will appear at the bottom and the the layer of strata last formed appear at the top. by using this information the approximate age of rocks can be determined.

2. carbon dating is used to find the relative age of rock in numbers which means for the rocks that has age between 1-70,000 years.

3. for the rocks of age range between 1,000 - billion of years potassium-argon dating is used.