In this image, which blue letters represent polar covalent bonds. select them by going by the blue letters.

The answer to your question is  A, C, and F

Explanation:

Polar covalent bonds are formed between two nonmetals which difference of electronegativity is between 0.5 and 1.7. Use this rule to determine which bonds are polar covalent bonds.

A)  H and O     3.44 - 2.2 = 1.24           Polar covalent bond

B)  C and H      2.55 - 2.2 = 0.35        

C)  C and O      3.44 - 2.55 = 0.87        Polar covalent bond

D)  C and C      2.55 - 2.55 = 0

E)  N and C      3.04 - 2.55 = 0.49      

F)  N and H      3.04 - 2.2 = 0.84          Polar covalent bond

•there must be variation for the particular trait within a population.

•the variation must be inheritable (that is, it must be capable of being passed on from the parents to their offspring).

•individuals with one version of the trait must produce more offspring than those with a different version of the trait.good

explanation:

the relative standard reduction potential of the half-cell in which reduction occurs; more positive than the other half-cell. reduction is a chemical process in which electrons are added to an atom or an ion; it always occurs accompanied by oxidation of the reducing agent.