From a single fertilized ovum undergoing a series of rapid cell divisions, a human infant develops. The embryonic cells become s
pecialized for a variety of functions. Which of these statements best describes how different cell types develop? A. Each cell type contains only the active parts of the DNA needed for that cell type.
B. Each cell has multiple copies of DNA that are affected in different ways by the environment to change the function of the cell at regular intervals.
C. Each cell has an identical copy of DNA with enzymes controlling the expression of specific genes, leading to a variety of cells.
D. Each cell type has only one chromosome containing thr DNA needed for that cell type.
Scientists divide the Earth into three layers based on composition: the crust, the mantle, and the core. These divisions are based on the compounds that make up each layer.
a depressive and monotonous atmosphere as well as a happy, exciting and stimulating one. Appropriate colors are important in terms of protecting eye health, providing a creative and productive space and protecting physical and mental health.
