The controlled timing of gene expression is crucial to an organism because it allows for which of the following? differentiation specialization development all of the above

Ineed to know why d is the correct answer asap

Facilitates growth and change in neurons and the migration of neurons to different sites in the brain

Which sentence best describes the relationship between chlorophyll and the chloroplast? a.) chlorophyll is a chemical found in a chloroplast. b.) chloroplast is a chemical found in a chlorophyll. c.) both chlorophyll and chloroplasts are found in animals. d.) both chlorophyll and chloroplasts make carbon dioxide.