Facilitated diffusion and are alike since neither requires energy. a) endocytosis b) phagocytosis c) active transport d) simple diffusion

Explain how paleontologists use trilobite fossils as index fossils for various geologic time periods.

Find the mass of the cone using the triple beam balance. a. 543.0 g b. 542.0 g c. 504.28 g d. 502.8 g select the best answer from the choices provided a b c d

The table below shows the elements that mainly comprise each of the four layers of earth: elements in layers layer main elements crust oxygen, silicon mantle iron, magnesium outer core iron, nickel inner core iron which of these elements make up the layer that is 0.2 to 1.1 percent of earth's total diameter?