Which step in transcription occurs first? A:mRNA moves the code from the nucleus to the ribosome for protein production.

B: a gene is expressed through protein production.

C: RNA polymerase attaches to the promoter.

D: a repressor protein must attach to the operator.

Asnail, elodea (aquatic plant), or both were added to the tubes and they were stoppered. tubes were placed under a grow light for 24 hours and the results recorded. the test tubes were then covered for 24 hours to produce a dark environment and the results recorded. which statement best explains the change in test tube d from the light setup to the dark setup.

Hybrid instruments that play sounds that are part sampled and part synthesized are known as:

Drag each description to the correct location on the image. not all descriptions will be used. describe the parts of a comet. the frozen part of the comet the atmosphere of gases and dust formed when the nucleus vaporizes tail made of small, solid dust particles tail made of ions that appears to point away from the comet's orbit