The lateral meristems in woody plants provide for secondary growth, increasing the thickness of roots and shoots. which of the following models correctly demonstrates the process of secondary growth? assume the center of the root or shoot is to the left, and the outer surface is on the right.

answer: land bridge theory. land bridge theory held that shifting portions of dry land explained the finding of identical species on different continents. plate tectonic theory eventually eliminated the land bridge theory.

the electromagnetic energy from the sun arrives in the form of visible and invisible light.

the correct answer is 4) heat and pressure

metamorphic rocks arise from transformation of existing rocks types, in a process called metamorphism. during metamorphism the original rock(prolith) change into metamorphic rock by heating (150-200c) and pressure of more than 1000 bar. the original rock can be sedimentary, igneous, or existing metamorphic rock.