Answer:
B
Explanation:
They come from other Rocks or living things such as bones,leaves,stems, etc.
All galaxies have a dense core of stars. Spiral galaxies, however, have arms that are often visible. There are two kinds of spiral galaxies: barred, where there appears to be a line running from arm to arm through the core, and <span>ordinary, where there is no bar. @Badbunnyhunny</span>
Living organisms use two major types of energy storage. Energy-rich molecules such as glycogen and triglycerides store energy in the form of covalent chemical bonds. Cells synthesize such molecules and store them for later release of the energy.
Matrix
Metalloproteases (MMPs) are a part of metalloproteinase enzymes family playing
an vital part in healing wounds such as physiological or pathological processes
and even in morphogenesis, reproduction, embryonic development, tissue
remodeling, arthritis, cancer and cardiovascular disease. MMPs are a product by
activated inflammatory cells (neutrophils and macrophages) and wound cells
(epithelial cells, fibroblasts and vascular endothelial cells).
<span>Membrane-Type
MMPs (MT-MMPs) is a subgroup of MMPs which is helpful in breaking down of
extracellular material as well as in handling of biological molecules varieties. </span>
