Another name for unicellular organisms that dominated earth up to the precambrian time is
a. cyanobacteria.
b. stromatolites.
c. eukaryotes.
d. prokaryotes.

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.

Your sense of touch depends upon: a. direct contact b. heat chemical c. reactions d. pain

Astudent constructs a venom diagram to compare the organelle last in plant and animal cells which organelle should be listed under “both” in the diagram?