###### Answer: gene-> DNA -> chromosome-> nucleus

Birefringence is the optical property of a material having a refractive index that depends on the polarization and propagation direction of light. These optically anisotropic materials are said to be birefringent (or birefractive).The birefringence is often quantified as the maximum difference between refractive indices exhibited by the material.

Double fertilization is a complex fertilization mechanism of flowering plants (angiosperms).This process involves the joining of a female gametophyte (megagametophyte also called the embryo sac) with two male gametes (sperm). It begins when a pollen grain adheres to the stigma of the carpel the female reproductive structure of a flower.The pollen grain then takes in moisture and begins to …

A flowchart is a type of diagram that represents a workflow or process.A flowchart can also be defined as a diagrammatic representation of an algorithm a step-by-step approach to solving a task.. The flowchart shows the steps as boxes of various kinds and their order by connecting the boxes with arrows.

In mathematics graph theory is the study of graphs which are mathematical structures used to model pairwise relations between objects.A graph in this context is made up of vertices (also called nodes or points) which are connected by edges (also called links or lines).A distinction is made between undirected graphs where edges link two vertices symmetric…