Which of the following best describes passive transport of materials across a membrane? passive transport requires energy and moves materials from areas of relatively lower to higher concentration. passive transport does not require energy and moves materials from areas of relatively lower to higher concentration. passive transport does not require energy and moves materials from areas of relatively higher to lower concentration. passive transport requires energy and moves materials from areas of relatively higher to lower concentration.

The answer is passive transport does not require energy and moves materials from areas of relatively higher to lower concentration.

Passive transport is a movement of ions and other atomic or molecular substances across cell membranes without need of energy input. Unlike active transport, it does not require an input of cellular energy because it is instead driven by the tendency of the system to grow in entropy.

c. earths continental crust is thicker than its lithosphere.

because, the lithosphere is the outermost layer of the earth/ 100 km thick and is defined by its machanical properties.the lithosphere contains oceanic and continental crust that varies in age and thickness across locations and geologic time. the lithosphere is the coolest layer of the earth in terms of temperature. the term lithosphere should not be confused with the use of "geosphere" which is used to indicate all of earth systems, including the atmosphere, hydrosphere   and biosphere. the surface of the earth can be divided into the continental crust and the oceanic crust.   the continental crust is made mostly of granite while the oceanic crust is made of basalt. the average thickness of the continental crust is 25 miles and the average thickness of the oceanic crust is 5 miles.   three types of rock, igneous, sedimentary, and metamorphic, make up the surface of the earth. that's why 3 option is preferable.

i believe your answer would be c.. : )