The phospholipid bilayer describes a structure with: a
b
ОООО
Polar heads on the outside and non-polar tails on the inside.
Non-polar tails on the outside and polar heads on the inside.
Polar layers on both the inside and outside.
Non-polar layers on both the inside and outside.
C

The phospholipid bilayer describes a structure with polar heads on the outside and non-polar tails on the inside (option a).

Explanation:

The plasmatic membranes of the cells behave as a semi-permeable barrier to the passage of substances, a characteristic that depends on the hydrophobic properties of its phospholipid bilayer.

Lipidic bilayers are formed by the union of phospholipids with a hydrophobic —non-polar— head and a hydrophilic or polar tail, so they are called amphiphilic.

The bilayer phospholipids are arranged keeping the head —with a phosphate molecule— on the outside while the hydrophobic tails, formed by a double chain of fatty acids, on the inside.

The other options are not correct due to the explanation above:

answer by yourhope:

hi! : )

in which structure in the nucleus are ribosomes made?

b) nucleolus!

: )

i think the answer is b.