Which system is responsible for the transportation of nutrients throughout the system? respiratory system circulatory system digestive system endocrine system

If a strand of dna has 35% thymine. what is the percentage of cytosine, adenine, guanine?

Pls me i need this ! each cell has genes activated depending on it's job and what kind of cell it is. it is the presence of that causes the repressor protein to fall off and unblock the gene on the lac operon. if a gene is turned on then it is being an additional circular chromosome found in some bacteria that is used in genetic engineering.

Which of these is evidence of global warming? a. overall rising seal levels b. falling global temperatures c. an increase in the size of glaciers d. stable precipitation patterns appex