Adult axolotls are typically aquatic, with gills and underdeveloped limbs, as shown in the image. Under certain conditions, an axolotl can undergo metamorphosis to its terrestrial form, which has completely developed limbs and lungs instead of gills. When an aquatic axolotl is either given food containing the element iodine or is injected with iodine, the axolotl rapidly undergoes metamorphosis to the terrestrial form. Based on this information, what is most likely true about the effect of iodine on axolotls?
A. Iodine causes mutations in the genes that regulate metamorphosis.
B. Iodine influences the expression of the genes that control metamorphosis.
C. Iodine causes the gills and limbs to evolve.
D. Iodine is toxic to the aquatic form of the axolotl.

Iodine influences the expression of the genes that control metamorphosis.

Explanation

[ answer ]

foliated

[ explanation ]

foliation forms in a rock when pressure squeezes the rock together. the rock then has a design of many different color little lines. there are three types of foliated rock. the types are slate, schist, and gneiss. each type of foliated rock is different based on grain size and foliation characteristics. the lines appear when the rock has been under pressure.

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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.