You didn't list any...
LAC = inducible repressor
TRP = repressive
Some reasons:
→ They're cheap and common animals.
→ They can be either a source of meat, skin (leather) or milk.
→ Farmers benefit a lot with them, since what they produce are things of everyday consumption.
→ You don't need to spend much to be able to have them (mostly only with land).
Hope it helped,
BioTeacher101
Answer:
To make proteins, DNA transcribes information into RNA in the nucleus. Transcription is like making copies of the information from DNA and applying this information in a new format. The RNA exits the nucleus and travels through the cytoplasm to ribosomes on the rough endoplasmic reticulum