Answer:
The fossils in the lower layers are older than the fossils in the upper layers.
Explanation:
Researchers have identified specific gene variants in the receptors that detect sweetness: TAS1R2 and TAS1R3. There is also high variation in the detection of bitterness. However, the story is more complicated than sweet taste, as we have 25 receptors that detect different bitter molecules
Answer:
most prokaryotes have a single double stranded circular DNA
the cell's nucleoid