The n-h bond in ammonia is polar because

a: nitrogen occupies more space than hydrogen.

b: hydrogen is much more electronegative than nitrogen.

c: it is a hydrogen bond.

d: it is an ionic bond.

e: nitrogen is much more electronegative than hydrogen.

The answer to your question is letter E. Nitrogen is much more electronegative than hydrogen.

Explanation:

Talking about bonding, we must know that there are two main types of bonds.

- Ionic bonds: these bonds are formed when we combine metal and a nonmetal and the electronegativity between these elements is higher than 1.7.

- Covalent bonds are formed when two nonmetals are combined. There are two kinds of covalent bonds:

  a) Nonpolar, the electronegativity between the nonmetals is between 0 and 0.5.

  b) Polar, the electronegativity between the nonmetals is between 0.5 and 1.7.

In this problem, the difference of electronegativity between nitrogen (3.04) and hydrogen (2.2) is 0.84, then this molecule has a polar bond.

answer; i believe the correct answer is ( proteins );

interphase

the period of cell growth when the cell synthesizes new molecules and organelles. the cell is not dividing and it constitutes the majority of the time spent in the cell cycle

prophase

changes occur in the nucleus and cytoplasm. the chromatin condenses to form structures (sister chromatids) visible with a light microscope and the mitotic spindle begins to form, but the nucleus is still in tact

prometaphase

the nuclear envelope fragments and the spindle microtubules attach to the kinetochores of the sister chromatids

metaphase

all the cell's duplicated chromosomes are lined up at an imaginary plane equidistant between the poles of the mitotic spindle

anaphase

begins when sister chromatids separate from each other and ending when a complete set of daughter chromosomes arrives at each of the two poles of the cell

telophase

the daughter nuclei form at the two poles of a cell

cytokinesis

the division of a cytoplasm to form two separate daughter cells. usually occurs during telophase during mitosis. this and mitosis make up to mitotic (m) phase of the cell cycle