Earlobes may be free or attached, as shown in the illustrations below. The type of earlobe a person has is genetically determined. The allele for free earlobes (E) is dominant, while the allele for attached earlobes (e) is recessive. The inheritance of the earlobe trait can be traced over several generations using a family tree called a pedigree. A pedigree for the earlobe trait is shown below. (QUESTION) If female #3 and male #4 were to have another child, what would be the probability of that child having attached earlobes? answers:
1/4
1/2
3/4

the answer to your question is b

the second type of galaxy is called a barred spiral, which has a thing called a bar straddling the nucleus

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 that is new experiments yield untrustworthy data and should be carefully considered, because you don't know what will happen with the experiments.