Brood size is defined as the number of lives Osprey that are laid in hatch from eggs in birds in a particular species of birds brood size is genetic genetically determined figure 1 shows to the brood size for a species of nesting bird figure 2 shows the frequency of brews size for the same species of birds £.20 generations later

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convection currents in the magma drive plate tectonics. heat generated from the radioactive decay of elements deep in the interior of the earth creates magma (molten rock) in the aesthenosphere. the aesthenosphere (70 ~ 250 km) is part of the mantle, the middle sphere of the earth that extends to 2900 km.

voluntary muscles are controlled by the cerebellum.

. the sierra madre fault zone of southern california

. the san andreas fault california