Which of the following prokaryotic transport systems does not require the use of cellular energy to bring compounds into the cells?
a. group translocation
b. endocytosis
c. abc transport
d. sidetrophores
e. facilitated diffusion

e. facilitated diffusion

Explanation:

Facilitated diffusion is one of the types of passive transport where the molecule moves from higher concentration to the lower concentration. Since the movement is along the concentration gradient, it does not require cellular energy.

It is called facilitated because some special proteins aid in the process. Many big and polar molecules can not cross the membrane easily despite the concentration gradient being present so they need the help of special proteins for movement. For example, water molecules are sometimes transported across the membrane using aquaporins.

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.

the missing space is phylum