According to the Doppler effect, the sound of a police car siren is louder and high pitched as it approaches the observer.
The abdominal cavity is the answer you are looking for.
Answer will be b for question
Answer: operon
Explanation:
An operon is a cluster of genes that are transcribed together to give a single messenger RNA (mRNA) molecule, which therefore encodes multiple proteins (Fig. 16.11). Such polycistronic mRNA is typically found in prokaryotes.
