Which geometric solid is the best model for the cell in the bottom two layers of cells? a. a sphere
b. a flat disk
c. a square pyramid
d. a cube

The correct answer is option D. cube.

Explanation:

The image represent the cells similar to the epithelial cells whcih is found in various tissues such as muscle, nervous and many more. These cells are found in cuboidal, columnar and squamous sha[es which found in normally double layer or in multiple layers.

These cells are cube like in structure with a spherical nucleus present in the center of the cell known in assocation of various cells.

b

explanation:

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.