10 points Each of the 4 major biomolecules are made of monomers. The mono in
the word monomer means one. Monomers are building blocks, when the
monomers are put together they build a biomolecule. Monomer means:
Four Building Blocks
Two Building Blocks
One Building Block
O
Three Building Blocks

One building block

Explanation:

The prefix mono means one

answer: the blood-brain barrier is a layer of specialized membranes and cell processes designed to keep undesirable substances from passing from the bloodstream into the precious tissues of the brain. while the blood-brain barrier does keep most bad things out of the central nervous system, it is not impermeable.

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.