PLEASE HELP!! Life is organized starting with (select)
which are bonded together to form [Select] that make up
[Select]. These are part of [Select] which in humans form (Select) that are part of
Select] that work together as (Select) that act to maintain homeostasis for the (Select)

Options :
Organ system
Organelles
Cells
Molecules
Organisms
Atoms
Tissues
Organs

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.

i think the answer is a.keratin is the pigment responsible for skin color.

answerbacterium;