On the maxillary left side, there's only one posterior tooth, which is large and has a fifth cusp and three roots. this tooth is a maxillary

a. second premolar.
b. first molar.
c. third molar.
d. central incisor.

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.

answer; endoplasmic reticulum;