Gene control mechanisms, or "gene expression," control .

A kinds and amounts of proteins in a cell
B DNA replication
C mRNA translation
D protein synthesis

10.Gene regulation in eukaryotes
A usually involves operons.
B is simpler than in prokaryotes.
C allows for cell specialization.
D includes the action of an operator region.

a. to encourage apoptosis

measuring light intensity

light meters can be used to measure light intensity. the meter is held at the soil surface and pointed in the direction of the maximum light intensity, and then the meter is read.

errors can be made when measuring light intensity by accidentally shading the light meter. the reliability of the results can be checked by taking many samples.