Read these sentences from the article. "Individual layers of ancient sediment form horizontal stripes on the rock. From a few steps back, the rock wall looks like a cross-section of a giant, stone encyclopedia." Why might the author have included this description of the rock wall?

Here's what I think  

Explanation:

They wanted you to understand that, to a geologist, the stripes on the rock are like the pages of an encyclopedia of information.

You start reading and getting information from page 1 of an encyclopedia, then go on to the next page, and so on.

In the same way, the lowest layer of stripes is the oldest and gives information on the earliest geological period. The layer above it gives you information on the next period, and so on.

air quality

poor drinking water

and heavy polution

can lead to poor health

why is cellular respiration important for homeostasis?

it changes food into energy that the organism can use.

which of the following is most likely to happen if a cell is not able to divide?

the cell will not be replaced when it is damaged.

explanation: