4. Which of the following accounts for most mutations? a. Mutations that alter polypeptide primary structure and mutations
that do not
b. Nucleotide misreads and sugar substitutions
c. Base substitutions and base deletions
d. Translations and inversions
e. None of the choices are correct

sorry I don't know the answer of this question

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.

several tissues working together form an organ, and several organs together make up an organisms.

the group of cell that carries out special jobs are tissue.