In which cellular organelle do the three posttranscriptional modifications often seen in the maturation of mrna in eukaryotes occur?

Its either a) or b),wind and water erosion gradually widen the canyon

The virus is considered to be are living item since they have hereditary material dnas or rnas. they can imitate and change. they respond to boosts, for example, radiation, chemicals, and warmth. they have antigenic properties. they are proficient to duplicate with a same hereditary constituent.

That is true tge cactus as a structural adaptation to its envirinment has it leaves reduced to spines. but this doesnt mean it cant produce food it produces food because of the presence of chlorophyll in its stem