Assume that a cross is made between a heterozygous tall pea plant and a homozygous short pea plant. fifty offspring are produced in the following frequency: 30= tall and 20= short. a) what frequency of tall and short plant is expectedb) if one wanted to test the goodness of fit between the observed and expected values, provide a statement of the null hypothesis. c) compare a chi-square value associated with this appropriate test of significance. d) how many degrees of freedom are associated with this test of significance?

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.