While playing soccer, allen falls and scrapes his knee. over time, the wound on his knee heals. how does this happen?
select one:
cells from blood flood the damaged area and become different cells.

cells in the damaged parts become larger and eventually become large enough to cover the wound.

cells in the damaged parts divide and produce more cells by undergoing mitosis.
cells grow in different parts of the body and then arrive at the damaged part through blood.

The correct answer is cells in the damaged parts divide and produce more cell by undergoing mitosis.

Explanation:

Mitosis is a process by which total number of chromosomes of parental cell is distributed equally within the 2 newly formed daughter cells.As a result the each daughter cell has same number of chromosome with respect to that of parental cell.

    Mitosis also helps in wound healing by replacing the damaged cells with newly formed cells by cell division.

1 digestive system

2 stomach

3 bladder

4 carbon deoxide

5 tiger

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.