Pleas HELP Animal cells are bathed in an
isotonic fluid, and plant and
bacteria cells have a cell wall.
What does this protect the cell
membrane from?

A. shrinking
B. bursting
C. stretching

When coal has reached it hardest, darkest form, it is called select one: 0 a. sub-bituminous b. lignite c. bituminous d. antrhacite next page

Which set of characteristics best describes sedimentary rock? a) largest type of rock, made of organic matter, hardest type of rock b) often contains layers, forms near sources of water, contains fossils c) least abundant type of rock, made of other rocks, made mostly of minerals d) most abundant type in earth's crust, made of magma/lava, contains no fossils

What are the student's observations and inferences before he starts his investigation?