How do index fossils help scientistsHow do index fossils help scientists? They aid in the study of ranges of different organisms.

They advance understanding of the origin of life on Earth.

They aid in comparison of rock layers at distant locations.

They advance understanding of rock type at the time the organism lived.

C: They aid in comparison of rock layers at distant locations.

Explanation:

Index fossils are simply fossils of organisms that existed over a wide area and for just a brief duration of time. These fossils help scientists to date rocks and even matching the layers.

Looking at the options, the correct one is Option C.

c. because step up transformer steps up the input voltage i.e increases the input voltage  

the number of turns are greater on the secondary side of step up transformer  

transformer does not handle dc current

i just learnt this recently but i need to look through my notes again