PLZ help! Which correctly describes crossing over? choose one. i will mark brainliest the process whereby non-sister chromatids exchange genetic material

the process whereby homologous chromosomes are pulled to opposite poles of the cell

the process whereby sister chromatids are pulled to opposite poles of the cell

the process whereby homologous chromosome pairs align randomly along the metaphase plate

the process whereby nonsister chromatids exchange genetic material

Explanation:

Crossing-over is a unique phenomenon which occurs only in the prophase I stage of meiotic division i.e. meiosis I. It is the process whereby nonsister chromatids of homologous chromosomes (similar but non-identical chromosomes from male and female parents) exchange their genetic material.

water is a polar molecule. a chemical bond is a force of attraction between atoms or ions. bonds form when atoms share or transfer valence electrons. atoms form chemical bonds to achieve a full outer energy level, which is the most stable arrangement of electrons. so, false

explanation:

in h2o molecule, two water molecules are bonded by a hydrogen bond but the bond between two h - o bonds within a water molecule are covalent. the greater the electronegativity difference, the more ionic the bond is. bonds that are partly ionic are called polar covalent bonds. nonpolar covalent bonds, with equal sharing of the bond electrons, arise when the electronegativities of the two atoms are equal.