Which statement is not part of the cell theory? A. Cells are the basic unit of structure and function in all living things.
B. Animal cells are generally more complex than plant cells.
C. All living things are composed of cells.
D. All cells are produced from other cells.

Acave rescue team lifts an injured spelunker directly upward and out of a sinkhole by means of a motor-driven cable. the lift is performed in three stages, each requiring a vertical distance of 10.0 m: (a) the initially stationary spelunker is accelerated to a speed of 4.90 m/s; (b) he is then lifted at the constant speed of 4.90 m/s; (c) finally he is decelerated to zero speed. how much work is done on the 68.0 kg rescue by the force lifting him during each stage?

How does the amount of energy required to hold each proton and neutron in the nucleus compare to the energy released when they are removed?

Which diagram correctly demonstrates the various forces acting on a ball moving horizontally with some speed?