Biologist lynn margulis proposed a theory stating that different prokaryotic organisms joined in symbiosis to eventually become eukaryotic cells. which statement supports her theory?

a mitochondria do not use oxygen to produce energy.
b mitochondria have their own dna different from the chromosomal dna in the nucleus.
c smaller eukaryotes were swallowed by larger ones and became organelles within the larger ones.
d large prokaryotes swallowed small eukaryotes and became the organelles for the new larger eukaryotes.

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.

i think its both a and b

propane is burned to provide the heat in many cooking grills. the chemical reaction for this process is shown in the equation below.

c3h8 + 5o2 ? 3 co2 + 4h2o + energy

what are the products in this chemical reaction?

3co2 + 4h2o + energy

what are the options