6. For the passage's author, lines 20–24 mainly serve to support his earlier point that:
F. the string of victories by the Japanese military made
them a dominant force.
G. the Japanese were desperate to put an end to
American victories.
H. nearly 100,000 American troops had surrendered to
Japan in the Philippines.
J. the attacks on Pearl Harbor and Clark Field caught
the Americans by surprise.

the answer is d. chordata

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.

not necessarily. higher fitness requires the organism to be reproductive successful. for example, an organism at age 10 with 15 offspring is much more fit than an organism at age 15 with only 5 offspring.