Insulin is needed to regulate sugar levels in the blood. while every cell in the body contains genes for the production of insulin, it is only produced by a specialized subset of cells in the pancreas. therefore:

Therefore; there should be mechanism of gene regulation that promote insulin expression in the specialized pancreatic cells and prevent insulin expression in all other cells. Regulation of gene expression includes a wide range of mechanism that are used by cells to increase or decrease the production of specific gene products and is informally termed gene regulation.

Leaves specifically the gas exchange between plants and the environment. while plants undergo photosynthesis, they also partake in cellular respiration. respiration is the process that happens in the leaves of plants.

A. convection currents in the mantle.is the correct answer