Fossils of shellfish and snails are commonly found in the Las Vegas valley. What can you infer about the environmental conditions in the Las Vegas
valley millions of years ago? The Las Vegas valley

Once contained a forest
Once contained a shallow sea
Once contained a glacier
Was always a desert

maybe number one sorry if i wrong

the "power" of a lens is its resolution power, or its ability to distinguish between to closely located points. with the low power lens, it is likely you will see the rough form of the hay and maybe some movement of dots around the hay. however, when observed with the high power lens, the detailed features of the hay become visible and the microbes being grown are more clearly visible.

i hope this you

unicellular organisms, like bacteria, are able to perform all life functions within one single cell. multicellular organisms need many different types of cells to carry out the same life processes. each of these special types of cells has a different structure that it perform a specific function.