Osmosis is explained by the selective permeability of membranes combined with , which is defined as the process of random movement toward a state of equilibrium

Diffusion

Explanation:

The osmosis is explained as the selective permeability of the membranes which allows the movement of the solute from higher concentration to lower concentration.

This is associated with diffusion which can be defined as the random movement of the particles in order to attain equilibrium.

The diffusion allows the movement of the particles and osmosis allows the movement of only selective materials.

a tetrad is the foursome during meiosis made by two homologous chromosomes that have each already replicated into a pair of sister chromatids.