<span>The rock that was found is limestone.
Limestone is a sedimentary rock that is created by marine organisms. When the organisms die, their bodies settle to the bottom of the ocean or sea, decompose, and all that's left is their skeletons. Those skeletons then compact over time until they're formed into limestone. It's mostly composed of calcium carbonate which does react with acids to produce carbon dioxide and water. The presence of limestone indicates that the area used to be under water. The presence of the fossils in the gray rock indicates that it is limestone instead of marble which is a metamorphic rock made from limestone that's been subjected to great heat and pressure. If the rock were marble, then there would be no fossils still in it.</span>
Answer:
Norepinephrine
Explanation:
Nerve cells and circulating hormones are the one responsible for vasoconstriction of the vessel walls, as they do not enter the tunica media of the blood vessel, the nerves do not synapse directly on the smooth muscle cells. Instead, they release the neurotransmitter, norepinephrine, which diffuses into the media and acts on the nearby smooth muscle cells, which result in contraction of the entire muscle cell layer and thus reducing the radius of the vessel lumen.
According to the context, actinobacteria organisms function describes decomposition part of the carbon cycle.
<h3>What are actinobacteria organisms?</h3>
It comprises a group of Gram-positive bacteria with a high G+C content in their DNA and a wide morphological diversity.
This group of microorganisms is widely distributed in natural ecosystems and is of great importance in participating in the decomposition of organic matter.
Therefore, we can conclude that according to the context, actinobacteria organisms function describes decomposition part of the carbon cycle.
Learn more about actinobacteria here: brainly.com/question/15395882
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There are 13 protons in the nucleus of an aluminum atom.
