In tissue engineering, scaffolds are built for growing replacement body parts primarily so that:
a. stem cells are accepted by the body
b. cells grow into the correct shape
c. tissue is more durable
d. this device does not need an external power source

Option B

Explanation: In case of tissue engineering, scaffolds are built for growing replacement body parts. This is done to provide a proper shape for the growth of the cells.

The cells in the body needs to grow in a proper shape and size means it should in the affected area only.

This will result in on time growth and development of the affected area as scaffold will provide a base for the growth of cells in proper shape.

number of molecules / avogadro's number * molecule molecular = mass

explanation:

we define a gram-molecular weight as the mass of one mole of any element or compound. a mole contains avogadro's number of units (molecules) –  

6.022

x

10

23

. so, dividing the number of molecules by avogadro's number gives us the number of moles. multiplying that by the molecular weight gives us the mass. from the periodic table we find the gram-molecular weight of u to be238 and of f to be19. so,  

u

f

6

will have a gram-molecular weight of 352g.