If this fossil is 65 million years old, what could this fossil suggest about organisms alive today?
A.
If it is similar to any two modern species, it could be a common ancestor of these species.
B.
A modern plant could be the ancestor of this ancient plant.
C.
If it is different from all modern species, it could mean that this plant never existed.
D.
It could be a very close relative of dinosaurs, which lived 65 million years ago.

A.

If it is similar to any two modern species, it could be a common ancestor of these species.

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.