Cellulose makes up the cell wall
I think it would be taxonomy which is the the classification of something. Mostly organisms.
Answer : The number of electrons in an atom is, 2 electrons
Explanation :
As we know that there are four quantum numbers which are principle quantum number, azimuthal quantum number, magnetic quantum number and spin magnetic quantum number.
The Principle quantum number, n = 3. That means the electron present in the third energy level.
The Azimuthal quantum number, l = 2. That means the electron present in the d sub-shell.
The magnetic quantum number,
. That means it shows the 2 electrons present in one of the five 3d orbitals.
Hence, the number of electrons in an atom is, 2 electrons

In a microwave oven, microwaves emitted by a small antenna are directed into the cooking compartment, and as they enter, they pass a set of turning metal fan blades.

it used to convey information from one place to another through intervening media,like- Radios and televisions

used in hospitals to produce photograph of bone to check for break or fracture.They can penetrate less dense matter such body tissue and skin.