31. which sequence lists the cell images in chronological order for mitosis? a. 1, 2, 3, 4 b. 4, 3, 2, 1 c. 1, 4, 3, 2 d. 4, 2, 3, 1

D 4,2,3,1

Image 4 represents prophase. It has the spindle fibres start emerge from the centrosome. The nuclear envelop breaks down and chromosomes become visible.

Image 2 represents the second stage of mitosis which is metaphase. In this stage the chromosome are lined up at metaphase as shown.

Image 3 represents the third stage which is anaphase. In this stage the  centromere split into two. Spindle fibers begin to elongate the cell.

Image 1 represents the fourth stage  telophase of mitosis. In this stage the chromosomes arrive at opposite pole and begin to decondense.

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.