Earth’s crust is broken into pieces that interact with each other in a variety of ways. A (4) consists of two plates that move away from each other. This forms a (5) between the two plates where (6) will rise up and form new crust. When two tectonic plates come together at a (7), mountains are formed. The third type of boundary occurs when tectonic plates slide past each other. The San Andreas Fault is an example of a (8).

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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.

b tumor cells have a cell wall instead of a membrane

explanation:

tumor cells different from normal cells because tumor cells have a cell wall instead of a membrane.

the answer is d p: cell, q: organ, r: organ system, s: tissue